A quality 80w90 filled to the bottom of the sight plug hole, works on most blowers. Honestly, I dont even remember what I last put in mine as far as brand. Prob some castrol or mobil 80w90. I dont think there is a need to get silly with brand here. Although, for the minimal amount of oil they hold, it sure wouldnt hurt to throw the good stuff in there.

Yep .sums it up nice there . Also the girth of those 8-71 and beyond blowers alone sometimes requires a little extra extra in engine mount scrutiny.

il answer this one,use a good synthetic 80w90 gear oil ,i like amsoil products,fill to the middle of the site glass with the blower sitting level.

Yes, they are not lightweights. Icdedppl and I weighed my 420 B&M's, and his old 8-71 BDS blowers. Just the blowers, no snouts, no carbs, no intakes. I wanna say they weighed around 70lbs. Throw carbs, intakes, intercoolers in the mix, and you're throwing some weight back there.

although, anyone serious about supercharging, and going fast, really shouldnt have wood screws holding their engines to the stringers.

sorry joe,i thought you might have called it a night.

It's good to have friends ! Great information here MT . Thanks

Mike your knowledge is welcomed anytime by me!

I dont have sight glasses, I tried filling mine halfway up the open hole, but I couldnt get the plug in fast enough! So i just always went to the bottom of the hole

You really dont want to be friends with us.

Mike and I spent 1.5 hours on the phone talking about monroe struts and tires tonight. Not exactly killing it in the cool guy department.

you dont need glasses to fill the hole,i like filling the hole from the bottom!

I would like to be a fly on the wall in the dyno room with you guys . I hope I didn't break your concentration here by asking questions .