Originally Posted By: JoeyM
what are the advantages for running a thinner oil?
fuel economy? the car is rated at 9mpg city, so i dont think it matters much to me.
hp? again, if i was beating on the car and wanted every last hp, i think i would be concerned about the oil temps and want a thicker oil.
less wear on startup? this i wonder about too, because if u read the ferrari chat thread that was blasting AEHaas, there is a ferrari mechanic on there that said in 30 years of wrenching on ferrari's he never saw wearing of parts due to failure of the oil. i also doubt too, that even if i own this car for my entire lifetime, it probably will never reach even 75k miles.
so forgive my ignorance, as i stated earlier, i am no oil expert, i am just learning here.
but y again do i want a thinner oil?
Joey, thin oil IS thick oil at a few degrees cooler operating temp.
The oil's visc is stated at +212f, which is to be considered normal operating temp. About 20 degrees cooler changes the oil's visc a full grade.
Get used to the the technical units for visc, it is usually measured in centi-strokes (cSt). A "regular" 30 weight oil is 10cSt at +212f/100c, that oil is much thicker if you don't reach operating temp. It effectively becomes a 40 (12 to 15 cSt) or 50 weight if you are just cruising, or taking short trips.
I believe an exotic car is likely set-up to cool oil quite effectively, so this effect may be exaggerated if you drive it moderately.
It's hard to dispute the result of DrHass' UOAs. He compared directly to a friend's similar car on spec Shell Helix Ultra 5w-50 and got lower wear on 5w-20 Motorcraft.
A lot of fanbois here have little more content to add to the site than to regurgitate "use ONLY the oem spec oil", but they banter on constantly. DrHass is on the far extreme of the scale from them, a brave position to be in.
Another thing to consider is the most modern and effective additives used now allow a thinner oil to be used while keeping wear in check.
what are the advantages for running a thinner oil?
fuel economy? the car is rated at 9mpg city, so i dont think it matters much to me.
hp? again, if i was beating on the car and wanted every last hp, i think i would be concerned about the oil temps and want a thicker oil.
less wear on startup? this i wonder about too, because if u read the ferrari chat thread that was blasting AEHaas, there is a ferrari mechanic on there that said in 30 years of wrenching on ferrari's he never saw wearing of parts due to failure of the oil. i also doubt too, that even if i own this car for my entire lifetime, it probably will never reach even 75k miles.
so forgive my ignorance, as i stated earlier, i am no oil expert, i am just learning here.
but y again do i want a thinner oil?
Joey, thin oil IS thick oil at a few degrees cooler operating temp.
The oil's visc is stated at +212f, which is to be considered normal operating temp. About 20 degrees cooler changes the oil's visc a full grade.
Get used to the the technical units for visc, it is usually measured in centi-strokes (cSt). A "regular" 30 weight oil is 10cSt at +212f/100c, that oil is much thicker if you don't reach operating temp. It effectively becomes a 40 (12 to 15 cSt) or 50 weight if you are just cruising, or taking short trips.
I believe an exotic car is likely set-up to cool oil quite effectively, so this effect may be exaggerated if you drive it moderately.
It's hard to dispute the result of DrHass' UOAs. He compared directly to a friend's similar car on spec Shell Helix Ultra 5w-50 and got lower wear on 5w-20 Motorcraft.
A lot of fanbois here have little more content to add to the site than to regurgitate "use ONLY the oem spec oil", but they banter on constantly. DrHass is on the far extreme of the scale from them, a brave position to be in.
Another thing to consider is the most modern and effective additives used now allow a thinner oil to be used while keeping wear in check.
