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Hi all, I have been running Castrol 20w50 since we bought the car in 2016 and I am thinking of switching to Shell Rotella T4 15w40. I notice on cold starts the car runs a little rough and we seem to get smoke out of the tailpipe that we didn't have for the first few years. After it warms up for 2 minutes and the oil begins to circulate everything runs like a top. We originally ran the 20w50 to prevent the oil light from flashing but it still does it. We've put on approx. 2000 miles since we bought it and the car mostly sees trips to the farmers market or ice cream shop on sunny days.
I am wondering if the car doesn't like the 20w50 oil. We only run the car in 40F temps and above but I am tempted to try a slightly lighter oil to see how it performs.
Curious on peoples thoughts about making the move and anything else we should be looking into? Thanks.
I am wondering if the car doesn't like the 20w50 oil. We only run the car in 40F temps and above but I am tempted to try a slightly lighter oil to see how it performs.
Curious on peoples thoughts about making the move and anything else we should be looking into? Thanks.