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My 312 yblock is in the process of being rebuilt. Should I use any additives during engine break in? Should I continue using additives after break in?
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Group: Forum Members
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Rusty_S85 (1/3/2019)
oldcarmark (1/2/2019)
I seem to recall that not too long ago Rotella-T 15w40 (not the Synthetic Version) was One Oil that was acceptable for use in Y-Block Engines. Personally I have been using it for 10 Years. It does still have sufficient ZDDP Content where many other HD Diesel Oils no longer have it. I have also read that it is rated for use in Gas Engines. Why is it no longer considered acceptable for use in Y-Blocks? It does not require the addition of the Zinc that has been discussed in this Topic. Rotella is still a go to oil last I heard. Just hard to find in some places. For me no local place stocks Rotella-T they have to order it. So my option is to hit up the local oreillys and get the 5 quarts I need in Valvoline VR1 20W50 conventional as they keep that in stock and its a high zinc oil designed with racing in mind but is also compatible on street vehicles. I don't think its a full on race oil the bottle seems to indicate it has the benefits of race oil with high zinc levels but is still a regular motor oil. Have You checked your local Walmart? As far as I know they stock it and Price is very good.
 
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Group: Forum Members
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I am using VR1. I think I'll skip the additive next time. Thanks.
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