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MK7 "Random / "Stupid" Questions Thread"

jimlloyd40

Autocross Champion
Location
Phoenix
Car(s)
2018 SE DSG
So what spec is the 5w40 then?
I thought the 502 spec was available in different weights. Maybe I'm wrong. Actually I use the weight I think is best for Phoenix. 10w30 in the winter and 10w40 in the summer. And I buy oil from a company called Cerma and I don't even know if it is 502 spec. Must be okay though since I've got 117K miles on my 18 SE.
 

cb1111

Newbie
Location
Virginia, USA
Why can’t one use the 502 5w40 in the newer gti’s? I doubt clearances changed any. It doesn’t make sense
Warranty for one. 508 has a dye so VW can tell if it has been used. There is a huge thread around here somewhere on the 2019 stalling issue that also , peripherally, discusses viscosities. It was started by dietcokefiend.

In short, while tolerances may not have changed, the coding has and was optimized for the thinner oil. I'm not sure anybody knows what the long term effects of using the wrong oil may be.

But why not just run what the engineers suggest - and it isn't just emissions or fuel economy.
 

El_bigote_AJ

Autocross Champion
Location
Las Vegas
Car(s)
2019 GTI bunny
Warranty for one. 508 has a dye so VW can tell if it has been used. There is a huge thread around here somewhere on the 2019 stalling issue that also , peripherally, discusses viscosities. It was started by dietcokefiend.

In short, while tolerances may not have changed, the coding has and was optimized for the thinner oil. I'm not sure anybody knows what the long term effects of using the wrong oil may be.

But why not just run what the engineers suggest - and it isn't just emissions or fuel economy.
yup.


The whole viscosity thing -with connection to stalling was a theory that’s was consistently debunked.

And I’m in agreement just run what’s specs... I ran motul sport in my 2019 for one cycle and otherwise have been running the spec 508 in my highly modified car and sent in Samples of the 508 and reports came back with zero flags and the typical Blackstone “you should think about extending your oil change intervals” lol
 

Keehs360

Autocross Champion
Location
Denver
Car(s)
Mk7.5
Warranty for one. 508 has a dye so VW can tell if it has been used. There is a huge thread around here somewhere on the 2019 stalling issue that also , peripherally, discusses viscosities. It was started by dietcokefiend.

In short, while tolerances may not have changed, the coding has and was optimized for the thinner oil. I'm not sure anybody knows what the long term effects of using the wrong oil may be.

But why not just run what the engineers suggest - and it isn't just emissions or fuel economy.
Good points thanks. I’ll be running the 5w40 at the track anyways
 

Dog Dad Wagon

Autocross Champion
Location
Innnnn West Philadelphia...
Car(s)
19 Alltrack 6MT
idk but I THINK the 7.5 is 508 spec. it's more for MPG and wtty

it’s not a 7/7.5 delineation, it’s down to the individual model years that VAG decided to switch over. P sure the ‘19 GTI/R’s are 508, while the 18’s (also 7.5) are 502. My ‘19 7.5 Alltrack w/ 1.8T is still 502. That was a big relief for me knowing I’d be pushing ~300WHP
 
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