Heavy 5w30 Oil

Joined
Nov 9, 2020
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134
I would like to know what brand make the heaviest 5w30 weight motor oil. Mobil 1, Castrol, Pennzoil In what varieties Synthetic, High mileage or fully synthetic? Thanks
 
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You need to look at the HT/HS not the “weight”. An oil with a relevant European approval is your best bet since the approval will dictate a minimum HT/HS. Grade is irrelevant here as is the winter rating unless you’re starting at very low temperatures.

Is this question related to all your other ones regarding consumption and high miles?
 

FCD

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What you are looking for is an ACEA A3/B4 5W-30, they tend to have a Kv100 right on the upper limit of a 30 usually around 12-12.4.

However i would imagine 5W-30 A3/B4 oils must be rare in the US.

You might consider Mobil 1 0w40, it's a pretty thin 40 and many people have used it in engines calling for 5w30 without problems.
 
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Paradise of Florida
Terminology that is accepted as and commonly used is just fine.
Heaviest, thickest, ... is just fine.

You'll want a 5w30 with an HTHS >=3.5. That'll get you the gnarliest 5w-30. Start with the Euro or Diesel specs, since some require >3.5 HTHS. This means you'll want the Mobil1/Castrol/Pennzoil euro oils, and avoid anything API SP/GF6.


Flip a coin.
 
Joined
Dec 26, 2005
Messages
23,651
Location
Upper Midwest
Terminology that is accepted as and commonly used is just fine.
Heaviest, thickest, ... is just fine.

You'll want a 5w30 with an HTHS >=3.5. That'll get you the gnarliest 5w-30. Start with the Euro or Diesel specs, since some require >3.5 HTHS. This means you'll want the Mobil1/Castrol/Pennzoil euro oils, and avoid anything API SP/GF6.


Flip a coin.
Also accepted and commonly used words such as “gnarliest”?
 
Joined
Feb 25, 2019
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Texas
The heaviest 30 is a euro 40. But if you feel inclined to stick to a 30 grade for some reason then Pennzoil platinum euro L 5w-30 is the thickest at 12.5cst. Get it at Walmart for a decent price.
 

Charmet37

Thread starter
Joined
Nov 9, 2020
Messages
134
You need to look at the HT/HS not the “weight”. An oil with a relevant European approval is your best bet since the approval will dictate a minimum HT/HS. Grade is irrelevant here as is the winter rating unless you’re starting at very low temperatures.

Is this question related to all your other ones regarding consumption and high miles?
I have a few vehicles with high mileage, Just wanted to learn more about oil viscosities, Do Walmart or my local auto parts store carry European oils.
 
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