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I’ll add that the oil temp impact of running 300V was noticeable vs OEM oil (15-20F cooler and took longer to heat up).
If the Red Line Euro 5W-40 doesn’t have a similar impact, I’ll probably switch back to 10w-40 300V, which is actually a tiny bit thinner at low/high temps than the RL Euro 5W-40 which is significantly thinner than regular RL 5w-40.
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