cloudmaster_321

I put in a fresh oil change before winter lay-up this past fall and used the Mobil V-Twin 20-50 after previously running the Brad Penn 20-50. I can't seem to find any stats on the ZDDP levels in the Mobil however. Maybe it's low? Not sure. I know this was a good oil to run, but I see that Amsoil Dominator 20-50 is advertising having high levels of ZDDP. Maybe that would be better yet? Any thoughts on the latest and greatest formulas of these two oils? Thanks.

28Eliminator

It looks like the Mobile V-Twin still has higher levels of ZDDP. Not sure what the other brands have. Here is a spec sheet from Mobile.
http://www.mobiloil.com/USA-English/...duct_Guide.pdf

minxguy

Lab analysis I received a month or so ago on MOBIL 1 V-TWIN showed 1529 PPM ZINC and 1507PPM PHOSPHOROUS.

Spectro Heavy Duty Petroleum Motorcycle 1816 PPM ZINC, 1643 PPM PHOSPHORUS

Spectro MOTORGUARD 1699 ZINC and 1427 PHOSPHOROUS.

Ken

slapshot

I use Valvoline VR1, and been very happy with this.

Here's some good info....http://forums.corvetteforum.com/c3-t...ppet-oils.html