I'm in an oil quandary here. So I've been reading that the newer oils have reduced zinc levels making it bad for older engines with non-roller cams causing increased wear. Does this only apply to the conventional oils or is synthetic affected as well? I have a lot of older muscle cars that I may be switching oils in.
Reduced zinc/phosphorus levels
- Thread starter jjulibarri
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Synthetic as well. The newer API SN oils (except in the heavier grades like 5w40) had reduced levels.
MolaKule
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The Royal Purple HPS series of oils has high level of zinc/phosphorus anti-wear additive's.
I have an 86' Celebrity I am using Quaker State Ultimate Durability in, and wonder if it is OK having flat tappets? 2.8L is No muscle car. My 07' Subaru has rollers.
Go with oils with Titanium instead. Better alternative.
Originally Posted By: walk23
Go with oils with Titanium instead. Better alternative.
I just received a case of Kendall w/Ti this morning, now on a fill of Kendall for my 1st time.
Prior oil was PP.
Reduced zinc/phosphorus levels trend seem to help protect the CATs, my understanding.
Go with oils with Titanium instead. Better alternative.
I just received a case of Kendall w/Ti this morning, now on a fill of Kendall for my 1st time.
Prior oil was PP.
Reduced zinc/phosphorus levels trend seem to help protect the CATs, my understanding.
Haven't the results of 300v motul revealed a good level of zddp?
Or use an HDEO like Rotella 10w30, cheap, readily available and effective.
Originally Posted By: KCJeep
Or use an HDEO like Rotella 10w30, cheap, readily available and effective.
That's what I have in my '75 GMC 350 right now. Is that better than using M1?
Or use an HDEO like Rotella 10w30, cheap, readily available and effective.
That's what I have in my '75 GMC 350 right now. Is that better than using M1?
I would not worry about it personally. We have been using oils with SM levels of ZDDP in 70's era SBC for nearly 10 years now. Engine failure has not happened yet. Also I highly doubt 1975 PCMO's had more ZDDP out of the bottle than what comes out the bottle today.
Not to mention that SN oils are a lot better formulated than anything you could buy off the shelves in 1975.
Not to mention that SN oils are a lot better formulated than anything you could buy off the shelves in 1975.
It's for API SN oils, just find an old API SL product and it should be higher. Doesn't QS defy have boosted zddp content? It's readily available all over.
Originally Posted By: KCJeep
Or use an HDEO like Rotella 10w30, cheap, readily available and effective.
That, and similar are what I use in my old cars.
Or use an HDEO like Rotella 10w30, cheap, readily available and effective.
That, and similar are what I use in my old cars.
Originally Posted By: dave1251
I would not worry about it personally. We have been using oils with SM levels of ZDDP in 70's era SBC for nearly 10 years now. Engine failure has not happened yet. Also I highly doubt 1975 PCMO's had more ZDDP out of the bottle than what comes out the bottle today.
Not to mention that SN oils are a lot better formulated than anything you could buy off the shelves in 1975.
^^This^^
I have run MANY flat tappet engines that I have rebuilt on SM and SN oils with zero issues. If your valve spring pressures are higher than stock, that may justify an added level, but adding excess can cause more wear in the form of corrosion.
I would not worry about it personally. We have been using oils with SM levels of ZDDP in 70's era SBC for nearly 10 years now. Engine failure has not happened yet. Also I highly doubt 1975 PCMO's had more ZDDP out of the bottle than what comes out the bottle today.
Not to mention that SN oils are a lot better formulated than anything you could buy off the shelves in 1975.
^^This^^
I have run MANY flat tappet engines that I have rebuilt on SM and SN oils with zero issues. If your valve spring pressures are higher than stock, that may justify an added level, but adding excess can cause more wear in the form of corrosion.
Brand Mobil 1
Viscosity 15W-50
Nominal Phosphorus Level, PPM 1200
Nominal Zinc Level, PPM 1300
Product Description Boosted, higher viscosity, advanced full synthetic formula designed for performance vehicles
Recommended Consumer Applications HT/HS applications. Racing and Flat tappet applications.
API, ILSAC, and Other Industry Approvals SN/SM
ACEA Approvals A3/B3-08, A3/B4-08, A3/B3-10
Viscosity 15W-50
Nominal Phosphorus Level, PPM 1200
Nominal Zinc Level, PPM 1300
Product Description Boosted, higher viscosity, advanced full synthetic formula designed for performance vehicles
Recommended Consumer Applications HT/HS applications. Racing and Flat tappet applications.
API, ILSAC, and Other Industry Approvals SN/SM
ACEA Approvals A3/B3-08, A3/B4-08, A3/B3-10
Originally Posted By: bigt61
Brand Mobil 1
Viscosity 15W-50
Nominal Phosphorus Level, PPM 1200
Nominal Zinc Level, PPM 1300
Product Description Boosted, higher viscosity, advanced full synthetic formula designed for performance vehicles
Recommended Consumer Applications HT/HS applications. Racing and Flat tappet applications.
API, ILSAC, and Other Industry Approvals SN/SM
ACEA Approvals A3/B3-08, A3/B4-08, A3/B3-10
Shame they don't import this here.
Only the 5w50. Not as good for my flat tappets.
Brand Mobil 1
Viscosity 15W-50
Nominal Phosphorus Level, PPM 1200
Nominal Zinc Level, PPM 1300
Product Description Boosted, higher viscosity, advanced full synthetic formula designed for performance vehicles
Recommended Consumer Applications HT/HS applications. Racing and Flat tappet applications.
API, ILSAC, and Other Industry Approvals SN/SM
ACEA Approvals A3/B3-08, A3/B4-08, A3/B3-10
Shame they don't import this here.
Only the 5w50. Not as good for my flat tappets.
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