Default Will Thinner Oils Damage Your Engine?

[Naks]

"What do oil weights mean? What does 5W-30 mean? Do thinner oils get better fuel economy? Do thin oils like 0W-20 protect your engine?

I spent some time discussing these questions with Mobil 1 engineers and am excited to share what I learned. There’s an incredible amount of testing and verification that goes into labeling a motor oil’s viscosity rating, which is the single most important factor for how a motor oil will perform in an engine. Motor oil is responsible for protecting your engine, removing contaminants, reducing friction and cooling your engine. Plus, motor oil creates a protective barrier between moving metal parts allowing for your engine’s longevity.

In this video we’ll use a 6.2L V8 engine cutaway from the C8 Corvette to better see and understand how oil interacts with automotive engines."

 

[Neuk_]

As is always suggested, stick to recommended oil specifications and you won't have any issues, I have never understood why people want to fiddle with different oil specifications.

 

[bromster]

This guy's channel is fantastic for car nerds.

 

[TheChamp]

As is always suggested, stick to recommended oil specifications and you won't have any issues, I have never understood why people want to fiddle with different oil specifications.

You won't necessarily have issues if you fiddle. I did fiddle with mine and the car is still going fine.

 

[Naks]

As is always suggested, stick to recommended oil specifications and you won't have any issues, I have never understood why people want to fiddle with different oil specifications.

me neither... all the old topies raved and ranted when the Defender Puma came out with 5w30 oil spec, claiming that it wasn't thick enough for 'warm' climates.

Nevermind those who claim witchcraft when they see that the JLR 5.0 Supercharged takes 0w20 oil - shouts of 'too thin', 'too watery', 'it'll kill the engine'...

I even saw an FB ad where a workshop is advertising service specials on the Puma with 15w40 oils

ffs, ambient temperature has nothing to do with the hot oil viscosity, the engine will run at its operating temp whether it's 0C or 50C outside.

 

[Nqindi]

You won't necessarily have issues if you fiddle. I did fiddle with mine and the car is still going fine.

Did you change the oil spec and it's still fine?

 

[TheChamp]

Did you change the oil spec and it's still fine?

Yes, It's actually much better now, it used to drink like a fish, but it's an old car so I can take calculate risks and try things, don't do it on your new car.

 

[Naks]

Yes, It's actually much better now, it used to drink like a fish, but it's an old car so I can take calculate risks and try things, don't do it on your new car.

yes, old engines were not designed nor machined at the extremely fine tolerances that modern engines are.

 

[Neuk_]

You won't necessarily have issues if you fiddle. I did fiddle with mine and the car is still going fine.

Define fiddle? My MkI Golf I could fiddle a bit with viscosity and it won't do much, I would do the same with my Touareg.

 

[Neuk_]

me neither... all the old topies raved and ranted when the Defender Puma came out with 5w30 oil spec, claiming that it wasn't thick enough for 'warm' climates.

Nevermind those who claim witchcraft when they see that the JLR 5.0 Supercharged takes 0w20 oil - shouts of 'too thin', 'too watery', 'it'll kill the engine'...

I even saw an FB ad where a workshop is advertising service specials on the Puma with 15w40 oils

ffs, ambient temperature has nothing to do with the hot oil viscosity, the engine will run at its operating temp whether it's 0C or 50C outside.

As you said, older engines tolerances are no where near modern engines, oone of teh reasons why modern engines are able to use 'thinner' oils.

Ambient temperature is a factor in cold starts, you want the right viscosity oil at your specific ambient temperature to assist with cold starts.

 

[Nqindi]

Yes, It's actually much better now, it used to drink like a fish, but it's an old car so I can take calculate risks and try things, don't do it on your new car.

That makes sense. I suspect the comments were directed at newer cars.

 

[BlackMamba]

Yes, It's actually much better now, it used to drink like a fish, but it's an old car so I can take calculate risks and try things, don't do it on your new car.

We together there on the calculation, skorokoro is munching all my randelas

 

[genetic]

As is always suggested, stick to recommended oil specifications and you won't have any issues, I have never understood why people want to fiddle with different oil specifications.

This. He even mentions it in the video.

RTFM!

 

[TheChamp]

We together there on the calculation, skorokoro is munching all my randelas

Some cars are generally not fuel efficient from the factory, some cars are not fuel efficient because of improper servicing and general neglect, mine is the former.

 

[Big Rat]

Jeep 4.7 V8 needs 05-W30 when new. that was 2003.
With 270 000 on the clock the engine loosened up a bit, as old engines do.
And 05w30 being hen's teeth and bloody expensive, i went to 15w40.
THe first 10 seconds of startup the 05W30 sounded smotther and quiter.
But after that, especially when warm the 15W40 have the engine smoother and more quiete.
BUt this is based on a Jeep 4.7 V8 17 years old, Not a spanking brand new car. in 203 the engine had fine tolereances, not so much anymore. and not by today's standards.

Keep in mind a thicker oil cannot fill all the spaces a thinner oil can reach.
My humble 5c.

 

[killerbyte]

With the Alfa Romeo Giulietta the standard spec is a 5W40 oil meeting the Fiat spec. This oil is fine even in the highly tuned stage 2 hybrid setups that we run, although some of the guys prefer to use the Motul V300 5W30 racing oil.
I have chosen to stick tousing Liqui Moly or Motul 5W40 due to it being cheaper than the racing oil.

 

[aleksandar]

Who will post about oil if not a landy guy @Naks

I remember all the craze about delo 400, put it once and TD5 was running like real tractor.
Went back to the spec oil straight away.

 

[Naks]

Who will post about oil if not a landy guy @Naks

I remember all the craze about delo 400, put it once and TD5 was running like real tractor.
Went back to the spec oil straight away.

Haha, ah, yes, the good old Delo 400

 

[ChuckMeFarley]

yes, old engines were not designed nor machined at the extremely fine tolerances that modern engines are.

BS, All engines are machined to a extremely fine tolerance, This guy even went to go look at past and present trends to see if modern engines had tighter tolerances - https://www.machinerylubrication.com/Read/365/a-tight-squeeze

 

[dj_jyno]

me neither... all the old topies raved and ranted when the Defender Puma came out with 5w30 oil spec, claiming that it wasn't thick enough for 'warm' climates.

They probably also had a stroke when they saw the 20 000 km service interval... unless Land Rover reduced it for that version of the Puma engine.