Quote:
Originally Posted by FirstToy
check 80s tech for discussion about it
I think RP is not as good as other synthetics for the money.
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Mind explaining that? I've been using RP for quite awhile and noticed a difference the second I switched from Valvoline Full Synthetic to Royal Purple Synthetic. The engine "purs" and idles much smoother, I also used it in my rear differential when I changed that out at 15k, WAYYY smother thier gear oil is AWESOME! As to the comment above...don't know why people say that without backing it up, unless of course it's just a random opinon...anyway, stay away from Castrol and Valvoline. Castrol is NOT a full synthetic regardless of what it says, and Valvoline just wasn't that good. The THREE You want to decide on are, Mobile1, Royal Purple, and Redline.
Royal Purple and Redline are made more for people who rev\race their engine around quite a bit compared to Mobile1, however Mobile1 still makes a fantastic synthetic oil, that is easily found at most places. Personally, I'd say Royal Purple, just because I've had great experiences with it. From what I hear, Redline is a BIT better than RP, but I can't find it in any local stores so I'm not going to bother with it. My engine and gears seem to love RP, so I'll stick with it.
BTW, why would you add a high-grade synthetic oil to a 80's Toyota? If you ask Royal Purple they DONT even recommend doing that, you're not going to see NEARLY the benefits on an old engine like that, and ontop of that if you've been running dino forever switching to SYNTHETIC can cause "complications". Old engines like those are best left on dino, as that was what was out at the time, so they were made for it. Never seen a test done on THAT old of a vehicle showing any benefits of synthetic, only on NEW cars have I seen the dynos.