Quote:
Originally Posted by steve99
the forester/wrx cooler will usually take 10-15C off your peak oil temps for about 15 minutes hard running, then they start to run out of capacity especially in warmer ambient temps.
Id probably switch to a 5w30 full synthetic oil in preference to the 0w20.
pretty well anyone who drives hard and doesnt live in a below freezing climate would be better on a 5w30 oil.
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I'd been running Mobil1 5W-30 since ~10K miles (~53K now), and just recently bumped up again to Mobil1 0W-40. Should pump a little bit easier at cold temps, and give me a little more peak heat resistance to thinning out.