Favorite Oil For Fd???
#3
Ex fd *****
NO NO NO - never 10-40 in a rotary (or any other car) it is the worst grade of oil to use - too many additives to produce the wide viscosity range. use 10-30 (winter) or 20-50 - Castrol GTX is the conventional oil of choice.
#5
So...I've been putting Castrol GTX 10w40 in my FD since I got the engine rebuilt...what exactly is the problem with this? What additives are you referring to? Why is 10w30 or 20w50 any better? Wouldn't 20w50 be a bit heavy for this rotary engine? Please cite some technical specifics so we can all benefit from this discussion
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