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What is your preferred motor oil for your stroker?

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Re: What is your preferred motor oil for your stroker?

Postby Nighmare » April 5th, 2017, 10:06 am

Joe Gibbs is what im using

charley3
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Re: What is your preferred motor oil for your stroker?

Postby charley3 » June 16th, 2017, 3:03 am

I recently discovered Shell Rotella 5w30 synthetic. It interests me, but I haven't used it.

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Re: What is your preferred motor oil for your stroker?

Postby Cheromaniac » June 18th, 2017, 12:25 am

I was using ADNOC Voyager Silver Semi-Synthetic 10W/40 for several years right up to when I sold my Jeep.

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Re: What is your preferred motor oil for your stroker?

Postby Mopud » July 5th, 2017, 9:19 pm

Penrite HPR 10 10W-50 Full Synthetic, all day every day in both my TJ stroker and my standard 4L XJ.

http://www.penriteoil.com.au/products/b ... -synthetic
2001 TJ 4.66L

WJrazz
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Re: What is your preferred motor oil for your stroker?

Postby WJrazz » July 17th, 2017, 8:13 pm

I was reading Golen Engines PDF on their 4.6L stroker. They strongly recommend running an oil with high levels of zinc additives for the life of engine. Either one of the custom racing oils like Joe Gibbs or a modern conventional oil with a can of zinc additive. From their engine manual:

"Why Zinc in my oil?
The Jeep inline 6 cylinder engine has what is called a flat tappet camshaft which requires certain oil additives one of which is Zinc.
The Zinc additive puts a protective coating on all metallic parts inside the engine and the camshaft needs this more than any to guarantee
a long life. Now you might be asking yourself why now? All early model engines from the 80’s and earlier came from the factory with a flat tappet camshaft. Well the US government noticed a few years ago that a huge percentage of newer vehicles were failing their local emissions tests.
Once they looked into it they found that the Catalytic converters were failing due to the higher levels of Zinc that were present in the engine
oil at the time. As all engines even brand new engines run they burn small amounts of oil through the combustion chamber and the Zinc was attacking the Cat’s and causing them to break down prematurely causing the failed emissions tests.
So as you can imagine the US government forced the auto makers to change their recommendations on oils and in turn had to force the oil
producers to dramatically lower the levels of Zinc in the oils to solve the problem which they did.
Now at this time about 2007 the Jeep 4.0 engine was not in production any longer and the Jeeps that were on the road had long since been properly broken in on the old high Zinc oil that was available in 2006 and earlier.
Now comes all the engines that are being built in the performance aftermarket such as the Jeep 4.6 stroker engine which has a flat tappet camshaft. We have gone through a seminar with Joe Gibb’s s Racing Oils to get all of the information that you are reading in this article and have found by using their oil or at least a Zinc additive on the break in as well as all of the oil changes to come has almost eliminated premature camshaft wear on our Jeep
4.6 engines.
So in close it is 100% mandatory to break your new Golen Jeep 4.6 engine in with a Zinc based oil and to run a Zinc based oil for the life of the engine. "

This was something I certainly didn't know about. My current stock WJ recently passed 250k miles on the original engine mostly running on Valvoline or Castrol semi-synthetic 10w40 for high mileage engines. It is showing signs of valve train wear , increasing lifter noise, especially when cold.
As they say, the downside to high zinc is trashing your catalytic converter over time. Something that could affect people in states with emissions inspections for sure. But that is a less expensive maintenance issue than replacing your cam and lifters or an engine.

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Re: What is your preferred motor oil for your stroker?

Postby Mopud » July 17th, 2017, 8:19 pm

That sums up the oil I use and why I use it. It has heavy zinc modifiers - wear rates are fantastic. I have gone through a few cats but i figure that was due to my A/F ratios and how it had a tendency to run a bit lean. I'm sure someone more knowledgeable will chime in with some good info but my choice of oil isn't going to change.

"HPR 10 is a premium, full synthetic SAE 10W-50 engine oil. It contains a DOUBLE LAYER of engine wear protection with FULL ZINC and Penrite’s advanced EXTRA TEN technology. It uses a combination of the latest additive technology and a low shear rate viscosity modifier, to ensure additional protection against wear, corrosion, oil oxidation, piston deposits and sludge under all conditions."
2001 TJ 4.66L

Russ Pottenger
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Re: What is your preferred motor oil for your stroker?

Postby Russ Pottenger » July 18th, 2017, 8:09 am

The zinc levels in our oil contributing to catalytic converter failure is way exaggerated.

A overly rich condition is by far a greater contributor

Powerkraut
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Re: What is your preferred motor oil for your stroker?

Postby Powerkraut » August 1st, 2017, 9:34 am

I've been running Delvac 15w40 with a half quart of lucas for years on my jeep and figured I was good to go. After reading this thread I'm not so sure anymore. Any recommendations for something that is easily available? Also, my work has STP oil additive on clearance for $2 a bottle, is that worthwhile as an additive?

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SkylinesSuck
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Re: What is your preferred motor oil for your stroker?

Postby SkylinesSuck » August 1st, 2017, 3:31 pm

Valvoline 10W-30 VR1 Racing Motor Oil - 1qt (Case of 6) (822388-6PK)
https://www.amazon.com/dp/B00DJ4FMK2/re ... GzbKF0EG99


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