Motorcycle oil in a CAR engine : V-Twin Forum: Harley Davidson Forums

seaquester5 · 05-31-2009, 03:33 PM

Ok, here's one with a twist. I have run the gamit on oil threads and I picked a brand of synthetic oil several years ago for my Road King and recently sold my Evo bike.The brand of synthetic oil I chose is not an issue and do not want to open that can of worms.I was cleaning the garage today and found 12 quarts of Harley 20w50 oil, not synthetic, I won't run it in the Harley since I am switched to synthetic. Anyone see a problem running it through an older American made pickup?Hate to give it away with the economy and all, and certainly do not want to throw it away.

mopar · 05-31-2009, 03:55 PM

I've done it before with no problems.

06roadglide · 05-31-2009, 03:56 PM

I don't think I'd do it, but that's me. I think it's too thick even for your climate.

03GLIDE_ · 05-31-2009, 04:11 PM

I wouldn't even think about it. Just do it. I used to run 20/50 in a lot of my old trucks.

kink04fxd · 05-31-2009, 05:12 PM

I run it in my lawn mower. No problems.

RG50 · 05-31-2009, 05:52 PM

If it's an old beater like my Jeep I would use it.
Had some Rev Tech 20-50 left over and used it my mower.

dynarule · 05-31-2009, 07:13 PM

First off, how old is the truck? Is it FI? I have a little story to tell about this very same thing and the cat converter. But if your truck is carbed then go ahead and use it.

fatty239 · 05-31-2009, 09:14 PM

To thick...Use it in ur primary or lawn mower...

msocko3 · 06-01-2009, 04:24 AM

I used to take the used oil from my bike and feed it to my truck, but then my truck only got 150 miles to a quart.

doc ock · 06-01-2009, 01:01 PM

When I had my F150 FI I ran 20w-50 when I moved to Phoenix. No problems ever. Sold that truck with 250k on the dial. I started to run 20w-50 when I had over 140k miles on it. I would use up the oil in the truck.

Smokedyvr · 06-01-2009, 04:21 PM

I change my syn out at 2000 - 2500 miles and the old plow truck she loves it.