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I would go with a dino oil that is recommended for high mileage engines. Like you, I have no idea what mileage is on my 351C, but I do know it's an older engine designed when synthetic wasn't even around. So, I put Castrol High Mileage 10w-40 in it. You are in a colder climate, so you may want to use a weight for colder areas, like 5w-40.
I have been running rotella 15/40. It has the zinc these old motors need to keep the camshaft from eating the lifters and the crankshaft from eating the soft copper/babbit bearings. Or I'll run normal oil with a zinc break in additive. Rich
I have been running rotella 15/40. It has the zinc these old motors need to keep the camshaft from eating the lifters and the crankshaft from eating the soft copper/babbit bearings. Or I'll run normal oil with a zinc break in additive. Rich
When you start reading on a regular basis about these old engines croaking from Dino oil failing when good change records are kept I'll buy into your concept.
Until then or something else PROVES it to be so, your recommendation to spend extra money on oil is without merit. IMHO.
i've heard about the zinc thing before, but don't know anything about it.
stopped at my local auto store on the way home for some other stuff, asked about zinc additive.. they pointed it out to me down the aisle. on the front of the bottle, in big bold letters it read "ZINC", on the back, in small print, it said "this product contains no ZINC or ???????"
I tend to shy away from all those additives. my dad was a mechanic and he was usually of the opinion that they were all snake skin oil, only gimmicks to get more money out of you...
I have been running rotella 15/40. It has the zinc these old motors need to keep the camshaft from eating the lifters and the crankshaft from eating the soft copper/babbit bearings. Or I'll run normal oil with a zinc break in additive. Rich
I run the Rotella 15/40 as well. It still has some zinc in it. Since I just shelled out quite a bit of money to rebuild my motor, I now use 4 quarts of Rotella 15/40 and 1 quart of Joe Gibbs racing oil just to make sure I don't wipe out the cam. It's just extra insurance for me. It may be a little overkill, but I like to play it safe.
I have been running rotella 15/40. It has the zinc these old motors need to keep the camshaft from eating the lifters and the crankshaft from eating the soft copper/babbit bearings. Or I'll run normal oil with a zinc break in additive. Rich
I use rotella 10W-30.
That zinc stuff was designed to be put in oil so that flat tappet engines dont eat their camshaft.
Y blocks, FEs, most SB fords, and alot of other engines are flat tapet engines. Guess what? No one in detroit or japan uses flat tapets anymore. So they took the zinc out of our oil.
Using regular oil will not ruin your engine tomorrow but it may ruin it next year. You need this.
Delo by cheveron still has it, STP treatment, GM break in additive, Bradd pen, I think valvoline racing oil, and Rotella.
Rotella is cheep and everywhere and I use it in all my vehicles save the wifes 2005 escape.
Feel free to use whatever you want. I would add some STP or plan on a rebuild however.
This is a popular argument. Do some searching in the Y block forum.
Rotella no longer has the high zinc levels of the past. That was seen in their CI-4 oil but now on the shelf is CJ/SM with lower levels. I noticed this last year. That pertains to their multi-grade oils as their single grades still have a CF API service level on them. Of course I have never seen their single grade anywhere. If you want zinc diphosphate then you are going to have to find racing oils like Valvoline. Penzoil does not list their zinc/phosphate levels in their pdf spec sheets anymore...Hmm. The Rotella data sheets also do not list their zinc/phosphate levels either.
look at the zinc/phosphate levels. They list it as % not as ppm that some have seen. In ppm you look for higher than 1200ppm and in % you look for equal or higher than 0.12.
When you start reading on a regular basis about these old engines croaking from Dino oil failing when good change records are kept I'll buy into your concept.
Until then or something else PROVES it to be so, your recommendation to spend extra money on oil is without merit. IMHO.
John
Google "Why do I need zinc in my motor oil?" and get back to us on that. Rich
The anti-friction components, zinc and phosphorous, were mandeated out of most all motor oils by the EPA a few years. Zn and P damage catalytic converters.
Two choices: (1) additives such as ZDDPlus or Delco's EOS or (2) racing oils, e.g., Brad Penn and Valvoline VR1.
The additive route is pretty expensive when you add up the cost of oil + additive.
I started using Brad Penn in my fleet two years ago. Using racing oils is cheap insurance vs the possibility of flat cam syndrome. Brad Penn is available through distributors. NAPA has VR1