i was in walmart and noticed they have castrol gtx in 5w-20 grade so decided
with this oil change in my old 1988 honda civic i'm using the newer grade.
hopefully it won't cause any damage. i don't think it will and i think it's
going to be an improvement. less strain on the crank shaft and pistons.
anyone who has any knowledge about the newer oil please let me know. thanks.
The only thing it do for you is increase oil consumption. The viscosity was
changed for new cars so they could post a slightly increase in corporate gas
mileage. Stick with the viscosities your car recommends unless you need a
heavier weight because of oil consumption....
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