Originally Posted By: fdcg27
You may have some big misunderstandings in basic engineering terms.
Documenting some of what you write might add some credibility to what you post.
Incidentally, back in the 'fifties, 20W-20 was the winter standard oil for cars in the US, so thinner oils are nothing new in this country.
No CAFE back then.
No CAFE when 10W-30 was the standard oil for almost every engine either.
You need to adjust to the idea that thinner oils on 8-10K change intervals may be optimal, which is why they're recommended here, in the land of cheap motor oil and long lived vehicles.
We drive a lot more here than you do there and we put more miles on our vehicles before they're scrapped.
Kind of turns that thick oil and long OCI thing around, doesn't it?
20 grade might have been the only cheap low viscosity oil available in the fifties, as multigrades were still new back then so folks changed oil viscosity with the seasons.
30 grades are generally regarded as the optimum oil grades for many engines in good condition and 10/30 is still a popular rating for long life oils.
There is no comparison between vehicle use in the US and the EU, most cars in the EU are diesels and are subject to very severe inspections.
You may have some big misunderstandings in basic engineering terms.
Documenting some of what you write might add some credibility to what you post.
Incidentally, back in the 'fifties, 20W-20 was the winter standard oil for cars in the US, so thinner oils are nothing new in this country.
No CAFE back then.
No CAFE when 10W-30 was the standard oil for almost every engine either.
You need to adjust to the idea that thinner oils on 8-10K change intervals may be optimal, which is why they're recommended here, in the land of cheap motor oil and long lived vehicles.
We drive a lot more here than you do there and we put more miles on our vehicles before they're scrapped.
Kind of turns that thick oil and long OCI thing around, doesn't it?
20 grade might have been the only cheap low viscosity oil available in the fifties, as multigrades were still new back then so folks changed oil viscosity with the seasons.
30 grades are generally regarded as the optimum oil grades for many engines in good condition and 10/30 is still a popular rating for long life oils.
There is no comparison between vehicle use in the US and the EU, most cars in the EU are diesels and are subject to very severe inspections.