I changed gear oil in the rear end last week NAPA didnt have the 80-90 in Mobil1 so I got Valvoline 75-90 hypoid, works great, and washed and cleaned it all over checked air filter and oil. Need to change oil but that's next weekend or middle of next week, fuel system is stabilized and ready I adjusted valves today to spec. Normally I cant get a normal screwdriver in there so I'd have to get em close and use a socket and ratchet to tighten the nuts with a socket and pull the gauge out with pliers (only a light amount of force was needed). But this time I thought "why not I'll give Spec a try" well I was able to get a normal flat blade screwdriver in there, and after getting the clearance set (a little on the tight side for me but still within spec to where you can get a gauge in and out). So sit back and relax time for me.