hi quick question
i have been running mobil one 10w-30 since I bought my brick 120,000 miles to now 190,000 miles and changes oil about every 5,0000 miles or less
now I would like to change to shell rotella fully synthetic 5w-40
my car has no current leaks and does not burn oil
will this change do any harm... north carolina climate
or should I just stick with what I have been doing.
I have been using the rotella in the other cars a 1996 volvo 960 and a 1997 chevy 454 suburban...
thanks for any feedback
patrick
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