Synthetic oils

I just try different oils and let the gauges tell the story, and when freshening...the bearings/cyl walls.

beyond a certain point , it's unnoticeable.. 'the differences that is'.

amsoil is pushed by military people, but government doesn't buy/use this exclusively, they use a lot of different 'labels'

the spec sheets tell u something, look at one sometime [all u amsoil users]
and no syn is not the end of it, not necessary but has it's benefits.
all the richard petty cars use shaeffers, remember...they get endor$ed by having the 'name' on the car....not by actualy using it....no one is checking to see..lol

but since valvoline/penns/havo/cast/etc.. have no intere$t in circle track 'driving schools' ....you'll see the brand they actually use in the car-on the side on the car.

just something to ponder.