Were I to use synthetic (Mobil-1) oil in a 1970 Cadillac
Eldorado [500 CI, 8.2 L, 550 lb-ft, 400 hP], which
grade would be best? The car has 51000 miles on it.
Is used approx. 2000 miles/year presently, though
hoping to take it on some lengthy (1500+ miles) trips
in near future. Car sees somewhat more use in hot
weather than cold, though is driven minimally every
other weekend for an hour in winter also. Largely
highway miles.
Would 15W-50 be the right grade? Or should I stick to the more common 10W-30? Right now I use regular (non-synthetic) 10W-40. Please advise. Thanks in advance.
snipped-for-privacy@deslab.MIT.edu
Would 15W-50 be the right grade? Or should I stick to the more common 10W-30? Right now I use regular (non-synthetic) 10W-40. Please advise. Thanks in advance.
snipped-for-privacy@deslab.MIT.edu