Oil type for brand new built 383? Sythetic??

[QUOTE="jos51700, post: 1971248775, member: 10255"Note: This data is kinda old.

I always run Mobil 1. Cheap enough at walmart, and factory fill on Vipers, so it's gotta be good stuff.

Be careful (as always) with Amsoil (or any oil. some skip the ZDDP in certain oil formulations but not others):
PLEASE BE AWARE: THIS IS A VERY OLD REVIEW. I'm not taking the time to hunt up more current stuff, but it IS out there.

I'm STILL waiting for an independent oil test comparing Amsoil to other oils to be posted on their site. If you look at Amsoil's site, once you weed through the fertilizer (yes there's bullshit on their site, but they also sell....fertilizer? and....supplements?) you'll see that their oil testing is done by...them?

Hmmmm....why would an oil company want to own an oil analysis company?
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So much for objective analysis! Buyer beware!

Just remember: factory fill. If a car engine under warranty goes tits-up, who pays for it? the factory. And they chose....[/QUOTE]

Why cloud the "discussion" with info that is literally OBSOLETE? At least you admitted that it's old. But how can anyone make an objective decision with misinformation that's not even close to being relevant anymore? Requirements/specs and formulas change almost year. In 2007, I believe, there was a huge change in oil when diesels of that year & newer were required to use a special formulation in place of the previous diesel oil blends. Each brand has several different formulations of the same viscosity oils. One can't say "I use Mobile 20w-50 oil and it has plenty of zinc to satisfy my needs", or whatever. In general, one may have a lot of zinc, another has "some" and another may have very little, if any. Which SPECIFIC one are you talking about? Most oils, including diesel oils, have had reductions in zinc & phosphorous so you can't take it for granted, if that's what you're looking for. One has to look for the latest info and/or specific advertising.

What's wrong with a company having a subsidiary of their own providing a service that they would have to pay more for if an outside vendor was used for their own needs as well as their customers? It's a good business practice. You're automatically assuming a conspiracy because you don't care for a particular brand. Feel free to submit your own samples to other reputable oil testing centers for evaluation.

I've experienced many of the benefits synthetics provide, which happen to be from Amsoil. Many people have used conventional oils with great results. But I race, need the extra level of protection that synthetics provide because I can't afford to take chances with my racing investments (truck/race car/trailer). After a lot of research, talking to other racers, engine & trans builders and my own experiences, I'm very satisfied with it, so I recommend it if someone asks for an opinion.