The cheapest Semi/Full synthetic 10w-30 oil that motul has is a full synthetic (approx. $80) i think some people don't really know the differance and just think that 10w40 is close enough.
I too think its a little high; but bennjamin wouldnt a 10w40 be less likely to burn at operating temperature due to it's weight resulting in a 10w30 (generally speaking) could possibly burn more? Probebly be best to get a compression test IMO.



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