Synthetic Or No Synthetic

[acflye]

I have a 92 LS 400 with 180000.....regular changes.....want to switch to full synthetic (mobil 1) is that to many miles to switch and do I need to seafoam the engine.....how is the seafoam thing done...pour it in and let run at idle for 30 min or what?

[mburnickas]

I have a 92 LS 400 with 180000.....regular changes.....want to switch to full synthetic (mobil 1) is that to many miles to switch and do I need to seafoam the engine.....how is the seafoam thing done...pour it in and let run at idle for 30 min or what?

No, you can switch anythime. I have switch cars only up to 160,000 miles to date. I would rather use, Lc20, B12 or Amsoil engine cleaner; since they are the best bang for the $$$$.

[ErMaK]

There shouldnt be a problem with switching over to synthetic however personally I tend to always try and at least use the same "brand" of oil that I have been using.