Should oil brand matter so long as specs are met?

[Bwalker]

I would say absolutely not. If an engine requires botique oils it's probably a poor design. For example a 4.0L Toyota 1GR FE will run an exceedingly long time on run of the mill oil while being flogged on.
Flame away.

 

[Chris142]

Nope

 

[4wd]

There will always be a range in “meets specs” - in some engines (like mentioned) it’s not likely to matter allot - whereas in a Subaru it could matter. Glenda might think so.

 

[chainblu]

These days... I will say No.
40-50 years ago........ maaaybe.

 

[maraakate]

I would say absolutely not. If an engine requires botique oils it's probably a poor design. For example a 4.0L Toyota 1GR FE will run an exceedingly long time on run of the mill oil while being flogged on.
Flame away.

Agreed. Also saw your posts in the 2T thread. Interesting stuff and I have a few 2T dirtbikes and mopeds myself...

Basically, frequent oil changes matter way more than boutique oils and filter brands. If UOA make you sleep better at night then go for it, I guess.

 

[ctechbob]

Just about any oil will get you out of warranty. That's all the manufacturer cares about. They'll even get you to the 120-150,000 mile mark that most/some cars today are designed for.

It's the tiniest percentage of people that aim for longer and put thought into 'better' oils.

 

[maraakate]

Funny because there's plenty going 200-300k on whatever crap they can put in there.

 

[Marrk]

A nice-looking label matters to me. Amsoil has been a disappointment in this regard.

 

[ATex7239]

I like the brands which have easy to claim electronic rebates and are readily available. Pennzoil, Valvoline, and Castrol seem to get me there the most. Rarely buy oil without a sale or rebate. Completely brand agnostic.

 

[TomYoung]

Branding is complicated. The brand is a promise of performance to the consumer. If you look at automobiles, you can see the brands that have engaged the consumer in this way, like Porsche, BMW, Honda, all names that mean something over time . On the other hand, you have Ford, Chevrolet, and defunct brands whose equity has been squandered. The OP is essentially asking whether oil can be considered a parity product where brand makes no difference,which is why I won’t buy Fram(?) or Argos, but will aim for Castrol, Mobil 1, Liqui Moly and Pennzoil.

 

[KS-Ryan]

My cars run fine on whatever oil goes in them. My LX470 currently has Tractor Supply synthetic ($15/5qt) and is running just fine. I get caught up in flavor of the month just like many here, but in all honesty, any oil sold in a major retail store will be just fine if it meets the specs for your vehicle.

 

[RDY4WAR]

I don't trust brands that end in "s" and start with "Luca" regardless of the spec.

 

[Bwalker]

Funny because there's plenty going 200-300k on whatever crap they can put in there.

Especially soundly designed engines like the one I mentioned.

 

[kschachn]

I would say absolutely not. If an engine requires botique oils it's probably a poor design. For example a 4.0L Toyota 1GR FE will run an exceedingly long time on run of the mill oil while being flogged on.
Flame away.

Do you agree with yourself here?

B

Post in thread 'Lake Speed Jr Called Amsoil Signature series Diesel oil a Group 3'

Apr 22, 2026

Many of you guys get all bent out of shape about what base oils a motor oil have. Its the entire formulation that matters.
20 or more years ago there was an SAE paper that compared group 4, 5 Mobil Delvac 1 5w40 against Group 3 Petro Canada Duron 5w40 in a fleet of Toronto taxis. Duron prevailed.

• Bwalker

• 
• 

 

[Bwalker]

Do you agree with yourself here?

B

Post in thread 'Lake Speed Jr Called Amsoil Signature series Diesel oil a Group 3'

Apr 22, 2026

Many of you guys get all bent out of shape about what base oils a motor oil have. Its the entire formulation that matters.
20 or more years ago there was an SAE paper that compared group 4, 5 Mobil Delvac 1 5w40 against Group 3 Petro Canada Duron 5w40 in a fleet of Toronto taxis. Duron prevailed.

• Bwalker

• 
• 

I did not give an opinion. Just made a statement.

 

[SC Maintenance]

Blasphemy

What would we have left to discuss?

 

[AdrianH]

Different brands of the same spec oil have different outcomes with regards to cleanliness. This forum is filled with success stories of gummed up engines that got clean by running a different brand of oil.

Brands make a difference, albeit it might be small.

If your statement meant that mineral, semi synthetic and full synthetic oil will be the same over time, then it’s a different discussion entirely

 

[Hootbro]

There are brands that test their oils to ensure they meet a spec and there are brands that just follow the recipe card from their base oil supplier and call it good.

 

[yagciogullari]

i go for the major brands like shell, mobil, total, castrol etc.
just their motoroil r&d budget is larger than the turnover of boutique brands like ravenol, liqui moly etc. lol
if i see a brand that i don't know (e.g., midland.) i dont prefer that.

 

[Pablo]

Just meet spec = gummy nasty rings

Or are you saying all the Valvoline Restore and Protect threads are just fluff?