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pretty sure it's a roller cam

Thanks T, well I am looking for advise on what viscosity to use for the break-in period, which it might end up being in temps from 0 F to 40 F. The workshop manual shows 20w/20 for those temps typically and 30w above 32F. I normally run 30w in it, but wasn't sure it that's a good viscosity for...

Thanks Goblin, no cats on my engine, I will check for availability at my local parts stores.

Thank you T, I have the workshop manuals but not an owners manual. Good to have another reference manual. I will probably go with 20w/50 for both break-in and regular oil changes.

Hello, I had my 98' 5.7 GSi rebuilt and I will be getting it back in the boat soon, but winter has started and I will be running it in temps above 0 degs-40's to break it in. What oil viscosity should I use? Manual says 20w/20 for temps 0-32 F and 30w for 32 degs and above. Can't find any...

Hello All, I had my 98' 5.7 GSi rebuilt and I will be getting it back in the boat soon, but winter has started and I will be running it in temps above 0 degs-40's to break it in. What oil viscosity should I use? Manual says 20w/20 for temps 0-32 F and 30w for 32 degs and above. Can't find any...