Oil viscosity
I live in San Francisco (mild temps) and have a '99 4runner with 110k on it and was thinking of switching to Mobil 1. I drive mostly city miles with a couple 300 mi. road trips every summer, and so far I've been using standard Pennzoil 5-30 every 3,000 mi. Should I switch to 10-30 since I have over 100K miles, and should I forget the synthetic and stay with the 3,000 changes? I just hate messing around with getting the damn oil filter out! Plus Costco has Mobil 1 for $4/quart.
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