Recent content by 87567

Well, I can add something relevant here from real world experience. My parents used to own a school bus company. In Wisconsin, that is indeed very severe service with all the starting, stopping, and idling at a very extreme temperature range. It is a very harsh climate. Moreover, it was fleet...

Yeah....I actually don’t disagree with anyone here. I just wanted to report what Mobil told me, and I agree about the poor response from them.... I’m going to stick with the Valvoline vr1 10w30 synthetic and change it regularly—maybe slightly more often than planned. Understood the...

Yeah... I appreciate the opinion, but I’m not going to do a HD diesel oil. We are right back to the same problem of inadequate ZDDP.

Ok....just reporting back for the benefit of everyone.... I called Mobil customer assistance and specifically asked about the Euro 0W40. They did not recommend that oil for me. They said I should not do it. I asked why and only got the standard boilerplate response that it was not designed for...

Ok. I get it. Thank you. The Mobil1 oil would be more versatile over a wider temperature range IF it has enough ZDDP. From 50-90F, would it be better if the ZDDP is adequate? It won’t be driven at temps beyond either side of that range. I checked oil pressure. It has 20 psi at idle when warm...

I did have the intake off at one point.....I honestly don’t remember if the heads were rival or oval....just don’t know...sorry. Wix oil filter 51060xp Mobil1 302a I know who the builder was....I can ask about the bypass. They probably won’t know.. More important to get the actual oil...

Ok....I don’t know the specs exactly. I got the truck from my father who had it done and he is no longer available for consultation. However, I know my dad and he never deviated from stock. All he ever wanted was OEM-period.... I can check the oil pressure and report, but I’m honestly not too...

Thanks on the Mobil1 suggestion. I actually prefer their products over Valvoline. I will consider that. The main reason I went with VR1 synthetic was for the ZDDP. I also want an affordable oil that is readily available. BTW also running with WIX! Napa Gold, or Mobil1 filters. I always buy the...

Hello, it is all stock except for headers and dynomax turbo mufflers with h pipe. I also switched to an edelbrock (1406) carb because the old quadrojet was not rebuildable. Running a new also stock turbo 350 tranny ( it should have the 400 I know, but was set up for a 350 and I went with it.)...

I have a rebuilt 1971 GMC 402 with 3000 miles on it. It is all stock with the flat tappet lifters. After break in, I ran Valvoline VR1 10w30 conventional for 3K miles. All seems ok. It used about a quart in 3K miles. Switching now to the VR1 synthetic 10w30, but it is in winter storage. It...