Quote:
Originally Posted by lkfoster
Two out of the three dealers in Phoenix use 5w-40 normally. On my first service I went along with it but had noticeable valve noise for the first half mile or so when temps dropped below 60 deg F.
The second time around I insisted on 0w-40, but with lows in the high 80s I can't tell if it made any difference.
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Same here in Southern California. Around here 5w-40 Mobil 1 is what I have seen them use.