I have a 2000 Elantra with 215k using Castrol HM 10W30, engine in gd condition, use miniscule oil on 3500 mi. Absolutely no leaks so all is well with that car.
I have a much newer car that I have hoarded Mobil 1 Syn 5W20 for back when it could be had for $21/jug. Mistake! I will not be able to use this 5W20 in the newer car for some yrs.
So..would it be another mistake to mix 2 qts Mobil 1 Syn 5W20 with 2 qts Castrol HM 10W30 for my nxt oil change for older car????
The last thing I want is to end up with a leaking/smoking older car that at the moment is doing quite well! My dealer tech says it would be ok to mix the two...but I dunno!
Any opinions are appreciated
I have a much newer car that I have hoarded Mobil 1 Syn 5W20 for back when it could be had for $21/jug. Mistake! I will not be able to use this 5W20 in the newer car for some yrs.
So..would it be another mistake to mix 2 qts Mobil 1 Syn 5W20 with 2 qts Castrol HM 10W30 for my nxt oil change for older car????
The last thing I want is to end up with a leaking/smoking older car that at the moment is doing quite well! My dealer tech says it would be ok to mix the two...but I dunno!
Any opinions are appreciated