Have you seen Castrols new euro spec 5w40? Have you tried running that yet by chance?
Have you seen Castrols new euro spec 5w40? Have you tried running that yet by chance?Royal purple is garbage, back on my vRs old motor when it used to burn oil, I did experiments with different oil brands, seeing which looked the cleanest after 5k and burned the least. I found:
Mobil 1 10w30 burned 0.8 quarts every 1200 miles
Royal Purple 5w40 burned 0.8 quarts every 600 miles
Valvoline 10w30 burned 0.8 quarts every 1200 miles
Castrol Edge 5w40 burned 0.8 quarts every 1800 miles
Been on Castrol for all my cars ever since.
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