The age old oil question - Pontiac GTO Forum
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post #1 of 15 (permalink) Old 01-23-2014, 09:43 PM Thread Starter
 
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The age old oil question

If yall arnt sick of this already lol
I have a 69 400 bored and stroked to a 461. High street performance cam in it. Engine has less than 5k miles on it. PO spent a huge amount of money on it. However I do not know the complete specs for it(bearing clearences etc.) Ive been running castrols 10w-40 in it for awhile now. But I recently did a complete gasket overhaul on it, leaky head gasket, and I was just curious about the type of oil yall would use during this situation. I understand the importance of zinc but since this isnt your average 400 I was curious.

Thanks for listening.
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post #2 of 15 (permalink) Old 01-24-2014, 12:42 AM
 
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If a flat tappet cam, then yes, keep the zddp coming. If roller cam, run whatever catches your fancy in a 10/30 or 10/40 weight. Some people like 15/40 but I am not one of those guys. The stuff is plenty thick during our cold spring and fall mornings. Keep in mind that I have recently gone through 2 flat tappet cams in 1,500 miles, so take my advice for what it is worth...

Here is a website that will learn you lots about oil...

- Bob is the Oil Guy
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post #3 of 15 (permalink) Old 01-24-2014, 06:13 AM
 
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Garage
I recommend Brad Penn 10w30. Matt

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post #4 of 15 (permalink) Old 03-10-2014, 11:53 PM
 
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I use Royal Purple oil in mine as the rest of the oil on the market is junk. They have taken all the good stuff out of the oil because of emissions so almost every oil company has jumped on the wagon not only for that but it saves them money to. If you have an older car that has a flat tappet cam you need to run the better blends form the companies that build the oils for our cars. If not you'll be doing just what I've done now. This is my 3 cam that went flat in 14 months because I was stubborn & used the reg. oil off the shelf. I now will only use the better blended oils for our cars. It may cost a bit more , but I'll tell you rebuilding an engine 3 times in 14 months isn't cheap either.
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post #5 of 15 (permalink) Old 03-11-2014, 09:09 AM
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I'm with Matt. But, that said, have been running Rotella since Kendall and Valvoline took the ZDDP out about 10 years ago. Both of my GTO's are flat tappet cams: the one in my '65 has 33 years and 50,000 miles of service, and the one in my '67 has 26 years and about 80,000 miles of service and neither have gone flat. But then, they are old, USA made cams, not off-shore junk.
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post #6 of 15 (permalink) Old 03-17-2014, 08:42 PM
 
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I also use Rotella because of the zinc. What are your thoughts on Rotella synthetic?
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post #7 of 15 (permalink) Old 03-17-2014, 09:16 PM
 
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I use Rotella, have for years never had any oiling issues. I have heard of some guys claiming rear seal leaks with synthetic but I like to just give the seal a bit of attention when I install it. Still using rope seals in all of my engines and don't even remember the last time one leaked.
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post #8 of 15 (permalink) Old 03-18-2014, 11:47 PM
 
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I hope you guys know that Rotella took out the zzdp to about 18 months ago because of cost. About 18 months ago they pulled the zzdp out because of cast & because of the gov. cracking down on them about how much there oil was hurting the environment because of the additives in there oil. They pulled it out to make the powers to be go away & get out of there business. So using there oil no longer helps our engines , it's no better then the cheapest oils on the market any more. There was an artical about them taking it out in Car Craft about a year & a half ago.
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post #9 of 15 (permalink) Old 03-19-2014, 12:29 AM
 
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According to the MSDS data sheets on their site ZDDP was reduced but still in the finished blend. Never had a bearing issue using Shell Rottela
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post #10 of 15 (permalink) Old 03-19-2014, 09:35 AM
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AS SGC states, the ZDDP levels have indeed been reduced. Still, they are much higher than 'conventional' oils, and in my own first hand experience with Rotella, it is super tough oil. It does not break down and fail like lesser oils can. It's amazing in bearing load tests. Unbelievable film strength.
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