Is 1,000 amps enough to jump a car?

For most 4-cylinder and many V6 cars, yes, if the maker rates it for your engine. NOCO's 1,000 A GB40 is rated for 6 L gas. But amps alone don't tell you: AstroAI rates its 1,500 A S8 for the same 6 L. Check the engine rating.

What size jump starter do I need for a V8 truck?

At least your engine size: 5.7 L covers the common 5.0 to 5.7 L V8s. With the extra 2 L for freezing weather, look for 8 L, such as the NOCO GB70 ($139.99).

What size jump starter for a diesel?

Use the diesel rating, not the gas one. It's lower than the gas rating for 21 of the 24 jump starters we read that give both. A 6.7 L diesel truck needs at least a 6.7 L diesel rating: in NOCO's line, the GB150 (7 L diesel) and GBX155 (8 L diesel). Neither has the extra 2 L we suggest for freezing weather.

Are peak amps the same as cranking amps?

No. Peak amps are a brief burst, and no standard test exists for them, so brands can't be compared on it. Cranking amps measure current held for seconds at a set cold temperature. Of 28 jump starters we read, only one (Clore) lists cranking amps.

Open hood of a pickup truck at sunset, a red clamp on the battery's positive post and a black clamp on a bare metal bolt

What size jump starter do I need?

Most cars and SUVs, with a 4-cylinder or V6 engine, need the NOCO GB40. V8 trucks and SUVs need the bigger NOCO GB70. Both are sized by engine liters, not the peak amps on the box.^*12, 13

For 4-cylinder and V6NOCO GB40 · rated 6 L gas · $99.95

Check price

For V8 trucks and SUVsNOCO GB70 · rated 8 L gas · $139.99

Check price

Heavy-duty diesel truck? Get the NOCO GB150 ($299.95). Other engines: pick yours below.

By Glovebox Data editors · Published October 24, 2026 · 28 jump starters' claims read on maker sites and Amazon

Pick your engine, get your jump starter

Each pick is the cheapest NOCO jump starter that NOCO rates for your engine size plus about 2 L, so it still starts on freezing mornings. Not sure which engine you have? Use your VIN below.

4-cylinderMost cars and small SUVsV6Midsize SUVs and trucksV8F-150 5.0, Chevy 5.3, Ram 5.7Big V86.2 to 7.3 L gasSmall dieselUp to 3 LDiesel truckPowerstroke, Duramax, Cummins

For a 4-cylinder, up to 2.5 L

NOCO GB40

NOCO rates it for 6 L gas and 3 L diesel. That covers a 2.5 L gas engine with the extra 2 L we suggest for freezing mornings.^*12

$99.95 on Amazon, October 24, 2026^*32

Check price on Amazon

For a V6, up to 3.8 L

NOCO GB40

NOCO rates it for 6 L gas and 3 L diesel. That covers a 3.8 L gas engine with the extra 2 L we suggest for freezing mornings.^*12

$99.95 on Amazon, October 24, 2026^*32

Check price on Amazon

For a V8, 5.0 to 5.7 L

NOCO GB70

NOCO rates it for 8 L gas and 6 L diesel. That covers a 5.7 L gas engine with the extra 2 L we suggest for freezing mornings.^*13

$139.99 on Amazon, October 24, 2026^*32

Check price on Amazon

For a big V8, 6.2 to 7.3 L

NOCO GBX155

NOCO rates it for 10 L gas and 8 L diesel. That covers a 7.3 L gas engine with the extra 2 L we suggest for freezing mornings.^*15

$369.95 on Amazon, October 24, 2026^*32

Check price on Amazon

For a small diesel, up to 3 L

NOCO GB70

NOCO rates it for 8 L gas and 6 L diesel. That covers a 3 L diesel engine with the extra 2 L we suggest for freezing mornings.^*13

$139.99 on Amazon, October 24, 2026^*32

Check price on Amazon

For a diesel truck, 6.6 to 6.7 L

NOCO GB150

NOCO rates it for 9 L gas and 7 L diesel. That covers a 6.7 L diesel. No NOCO model has the extra 2 L we suggest for freezing weather; the GBX155 ($369.95, 8 L diesel) comes closest.^*11

$299.95 on Amazon, October 24, 2026^*32

Check price on Amazon

Why these picks

Our pick for each engine
Engine	Our pick	NOCO rating	Price
4-cylinderMost cars and small SUVs	NOCO GB40	6 L gas · 3 L diesel	$99.95
V6Midsize SUVs and trucks	NOCO GB40	6 L gas · 3 L diesel	$99.95
V8F-150 5.0, Chevy 5.3, Ram 5.7	NOCO GB70	8 L gas · 6 L diesel	$139.99
Big V86.2 to 7.3 L gas	NOCO GBX155	10 L gas · 8 L diesel	$369.95
Small dieselUp to 3 L	NOCO GB70	8 L gas · 6 L diesel	$139.99
Diesel truckPowerstroke, Duramax, Cummins	NOCO GB150	9 L gas · 7 L diesel	$299.95

Source: NOCO product pages, read October 24, 2026; Amazon prices 2026-10-24^*11–19

How we pick. We only pick jump starters whose maker's own site states both the engine rating and the battery size, so the rating can be checked against something. NOCO is the one brand that does this for every model, and the GB40 is the jump starter Amazon shoppers buy most (20,000 last month). For each engine we take the cheapest NOCO rated for that engine plus about 2 L.

Why not the GOOLOO A3 ($69.96, rated 9 L)? It costs less and claims more, but GOOLOO doesn't list its battery size, so the rating has nothing to be checked against.^*6

Why not the AstroAI S8 ($42.19)? AstroAI rates it for 6 L too, but its Amazon title says 3,000 A while its own spec table says 1,500 A. We pick brands whose numbers agree.^*1

What we didn't check. We didn't test any jump starter. Every rating is the maker's own, the extra 2 L is our margin, and NOCO's spec pages give no cold-weather range.

7 jump starters claim the same 4,000 A but promise engines from 8 to 12 L

Peak amps don't predict what a jump starter can start. We read the claims for 28 jump starters on Amazon and on their makers' sites. Packs with the same peak amps promise very different engines, and 3 Amazon listings contradict their own maker's site.

Each dot is one jump starter's gas engine claim; the table below names them. Amber dots: the gas claim appears only on Amazon, or Amazon and the maker's site disagree.

Source: maker sites and Amazon listings, read October 24, 2026 · Download CSV · Free to reuse with credit to Glovebox Data

Every jump starter we checked, and where its rating comes from

Sorted by how many Amazon shoppers bought it last month. "Maker site": the maker's own page states the rating. "Amazon only": only the seller's listing does, and nobody we found checks it. "Disagree": the two give different numbers.

Jump starter claims
Jump starter	Box says	Engine rating claimed	Rating from
NOCO GB40Amazon · $99.95 · 20,000 bought last month	1,000 A	6 L gas · 3 L diesel^*12	Maker site
OXILAM Y2 6000A^aAmazon · $59.98 · 10,000 bought last month	6,000 A	All gas · 12 L diesel^*20	Gas: Amazon only
ZEVZO ET03Amazon · $59.99 · 10,000 bought last month	4,000 A	8 L gas · 7 L diesel^*28	Amazon only
GOOLOO A3Amazon · $69.96 · 10,000 bought last month	3,000 A	9 L gas · 6.5 L diesel^*6	Maker site
Unbranded 4500A with air compressorAmazon · $99.99 · 10,000 bought last month	4,500 A	9 L gas · 8 L diesel^*24	Amazon only
AstroAI S8^bAmazon · $42.19 · 8,000 bought last month	1,500 A	6 L gas · 3 L diesel^*1	Disagree
Unbranded 6000A with air compressorAmazon · $39.88 · 7,000 bought last month	6,000 A	10 L gas · 8 L diesel^*25	Amazon only
NOCO GB70Amazon · $139.99 · 7,000 bought last month	2,000 A	8 L gas · 6 L diesel^*13	Maker site
Scatach 3000AAmazon · $29.90 · 6,000 bought last month	3,000 A	9 L gas · 7 L diesel^*21	Amazon only
Sharmeal 7000A^cAmazon · $34.97 · 6,000 bought last month	7,000 A	All gas · 12 L diesel^*23	Amazon only
WOLFBOX MegaVolt24 4000AAmazon · $119.99 · 5,000 bought last month	4,000 A	10 L gas · 10 L diesel^*27	Diesel: Amazon only
Clore Automotive Jump-N-Carry JNC660^dAmazon · $126.02 · 5,000 bought last month	1,700 A	None given^*3	No engine rating
WOLFBOX MV24A 4000A with air compressorAmazon · $139.99 · 5,000 bought last month	4,000 A	10 L gas · 6 L diesel^*26	Maker site
NOCO GBX155Amazon · $369.95 · 5,000 bought last month	4,250 A	10 L gas · 8 L diesel^*15	Maker site
NOCO GBX45Amazon · $124.95 · 4,000 bought last month	1,250 A	6.5 L gas · 4 L diesel^*16	Maker site
AstroAI S8 Air^eAmazon · $59.97 · 3,000 bought last month	3,000 A	6 L gas · 3 L diesel^*2	Disagree
GOOLOO GP4000^fAmazon · $79.99 · 3,000 bought last month	4,000 A	10 L gas · 10 L diesel^*8	Maker site
GOOLOO GT4000SAmazon · $139.99 · 3,000 bought last month	4,000 A	12 L gas · 10 L diesel^*9	Maker site
NOCO GB150Amazon · $299.95 · 3,000 bought last month	3,000 A	9 L gas · 7 L diesel^*11	Maker site
NOCO GB20Amazon · $79.95 · 2,000 bought last month	500 A	4 L gas · no diesel rating^*14	Maker site
GOOLOO A5Amazon · $119.99 · 2,000 bought last month	4,000 A	10 L gas · 10 L diesel^*7	Maker site
NOCO GB50Amazon · $149.95 · 2,000 bought last month	1,500 A	7 L gas · 4.5 L diesel^*19	Maker site
NOCO GBX75Amazon · $249.95 · 2,000 bought last month	2,500 A	8.5 L gas · 6.5 L diesel^*18	Maker site
NOCO GBX55Amazon · $174.95 · 1,000 bought last month	1,750 A	7.5 L gas · 5 L diesel^*17	Maker site
DBPOWER 3000A (18000mAh)Amazon · $49.99 · 800 bought last month	3,000 A	8 L gas · 6 L diesel^*4	Amazon only
Hieha 4000A with air compressorAmazon · $59.99 · 800 bought last month	4,000 A	8 L gas · 7 L diesel^*10	Amazon only
DBPOWER 5000A / 80.66Wh^gAmazon · $69.99 · 200 bought last month	3,000 A	8 L gas · 6.5 L diesel^*5	Contradicts itself
Schumacher SJ1332^hAmazon · $122.50 · 100 bought last month	1,200 A	8 L gas · 6 L diesel^*22	Disagree

a Says it starts all gas engines. No gas size given.
b The Amazon title says 3,000 A. The listing's own spec table and AstroAI's site say 1,500 A.
c Says it starts all gas engines. No gas size given.
d Lead-acid pack. Clore lists 425 cranking amps, the only cranking figure any maker gave us, but no engine size.
e AstroAI's site says 6 L gas and 3 L diesel. The Amazon listing says 9 L and 6.5 L.
f GOOLOO's headline says it starts all gas engines; its spec text says up to 10 L. We show the 10 L.
g The Amazon title says 5,000 A. The listing's spec table says 3,000 A.
h Schumacher's site says 8 L gas and 6 L diesel. The Amazon listing says 7 L and 4 L.

Source: maker sites and Amazon listings, read October 24, 2026; prices 2026-10-24^*32 · Download CSV · Free to reuse with credit to Glovebox Data

Do you need a bigger jump starter in cold weather?

Size up if you park outside where winters drop below freezing. Every rating here comes from the maker, and none says what temperature it was measured at.

Only 10 of the 28 jump starters we read list an operating range. 9 of those say they work down to -4°F; 1 stops at 14°F. NOCO's spec pages list no range at all. Jump starters certified to the UL 2743 safety standard must print their operating range on the label, so check the label before winter.^*29

What's the difference between peak amps and cranking amps?

Peak amps are a split-second burst, and no standard test exists for them, so you can't compare brands on that number. Cranking amps measure current held for several seconds at a set cold temperature, which is closer to a real start.^*30

Only one of the 28 jump starters we read lists cranking amps: the lead-acid Clore JNC660, at 425 cranking amps next to 1,700 peak amps.^*3 The UL 2743 standard covers safety, not starting power, so a UL mark doesn't rate amps either.^*29

How to check a jump starter before you buy

Find the engine rating for your fuel. Look for "up to X L gas, Y L diesel." Ignore the peak amps.
Check that rating on the maker's own site. If only the Amazon listing states it, or the two disagree, treat it as unverified.
Look for the operating temperature range if you park outside in winter. No range listed means no promise for cold mornings.

Questions people ask

Is 1,000 amps enough to jump a car?: For most 4-cylinder and many V6 cars, yes, if the maker rates it for your engine. NOCO's 1,000 A GB40 is rated for 6 L gas. But amps alone don't tell you: AstroAI rates its 1,500 A S8 for the same 6 L. Check the engine rating.
What size jump starter do I need for a V8 truck?: At least your engine size: 5.7 L covers the common 5.0 to 5.7 L V8s. With the extra 2 L for freezing weather, look for 8 L, such as the NOCO GB70 ($139.99).
What size jump starter for a diesel?: Use the diesel rating, not the gas one. It's lower than the gas rating for 21 of the 24 jump starters we read that give both. A 6.7 L diesel truck needs at least a 6.7 L diesel rating: in NOCO's line, the GB150 (7 L diesel) and GBX155 (8 L diesel). Neither has the extra 2 L we suggest for freezing weather.
Are peak amps the same as cranking amps?: No. Peak amps are a brief burst, and no standard test exists for them, so brands can't be compared on it. Cranking amps measure current held for seconds at a set cold temperature. Of 28 jump starters we read, only one (Clore) lists cranking amps.

Review log

Prices and stock checked on Amazon October 24, 2026.
October 24, 2026: Published

Notes and sources

We didn't test any jump starter. We read the claims on each maker's product page and Amazon listing on October 24, 2026, and saved the exact wording. Where the two disagree, we say so.
"Box says" is the peak amp figure the maker or seller advertises. "Engine rating" is the largest engine the maker says the pack starts.
Size rule: a maker rating at least as big as your engine, for your fuel. The extra 2 L for freezing weather is our own margin, not a maker's or a standard's.
The hero photo is an illustration. Product photos come from Amazon. Next check: January 2027.

AstroAI S8: AstroAI product page · Amazon listing B0BZP6HCVS, read October 24, 2026.
AstroAI S8 Air: AstroAI product page · Amazon listing B0D2HDJ2TM, read October 24, 2026.
Clore Automotive Jump-N-Carry JNC660: Clore Automotive product page · Amazon listing B000JFJLP6, read October 24, 2026.
DBPOWER 3000A (18000mAh): Amazon listing B01D42TYFC, read October 24, 2026.
DBPOWER 5000A / 80.66Wh: Amazon listing B07DWSYYZR, read October 24, 2026.
GOOLOO A3 (air compressor): GOOLOO product page · Amazon listing B0D4DLXNR1, read October 24, 2026.
GOOLOO A5 (air compressor): GOOLOO product page · Amazon listing B0FNMLG15N, read October 24, 2026.
GOOLOO GP4000: GOOLOO product page · Amazon listing B09HJH1S41, read October 24, 2026.
GOOLOO GT4000S: GOOLOO product page · Amazon listing B09M9HQG73, read October 24, 2026.
Hieha 4000A with air compressor: Hieha product page · Amazon listing B0FRMR2PLC, read October 24, 2026.
NOCO Boost HD GB150: NOCO product page · NOCO product page · Amazon listing B015TKSSB8, read October 24, 2026.
NOCO Boost Plus GB40: NOCO product page · NOCO product page · Amazon listing B015TKUPIC, read October 24, 2026.
NOCO Boost Pro GB70: NOCO product page · NOCO product page · Amazon listing B016UG6PWE, read October 24, 2026.
NOCO Boost Sport GB20: NOCO product page · NOCO product page · Amazon listing B015TKPT1A, read October 24, 2026.
NOCO Boost X GBX155: NOCO product page · NOCO product page · Amazon listing B08WZFPXFM, read October 24, 2026.
NOCO Boost X GBX45: NOCO product page · NOCO product page · Amazon listing B0924V8SPC, read October 24, 2026.
NOCO Boost X GBX55: NOCO product page · NOCO product page · Amazon listing B08WZKRHZZ, read October 24, 2026.
NOCO Boost X GBX75: NOCO product page · NOCO product page · Amazon listing B08WYKD6TY, read October 24, 2026.
NOCO Boost XL GB50: NOCO product page · NOCO product page · Amazon listing B07MVY7K43, read October 24, 2026.
OXILAM Y2 6000A: OXILAM product page · Amazon listing B0D4JDNSCF, read October 24, 2026.
Scatach 3000A: Amazon listing B0G8ZNZPJK, read October 24, 2026.
Schumacher SJ1332: Schumacher product page · Amazon listing B07892JQ1Q, read October 24, 2026.
Sharmeal 7000A: Amazon listing B0GSZ7PHCZ, read October 24, 2026.
Unbranded 4500A with air compressor: Amazon listing B0FMD8Z8K2, read October 24, 2026.
Unbranded 6000A with air compressor: Amazon listing B0GFDFSWJM, read October 24, 2026.
WOLFBOX MV24A 4000A with air compressor: WOLFBOX product page · Amazon listing B0DWRYJWKG, read October 24, 2026.
WOLFBOX MegaVolt24 4000A (MV24): WOLFBOX product page · Amazon listing B0CRRKRJ2S, read October 24, 2026.
ZEVZO ET03: Amazon listing B0C42Y5TPD, read October 24, 2026.
ANSI/CAN/UL 2743, Portable Power Packs, scope (Standards Council of Canada notice); marking clause 69.1 as reproduced in a UL 2743 test report, read October 24, 2026.
WOLFBOX, "Sizing a jump starter correctly" (a seller's blog, not a standard), read October 24, 2026.
NHTSA Product Information Catalog and Vehicle Listing (vPIC) VIN decoder, U.S. Department of Transportation.
Prices and sellers: Amazon Product Advertising (Creators) API, read 2026-10-24. Units: Amazon's "bought in past month" on each listing, October 24, 2026.