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AMSOIL are you folks believers?

sf5211

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Hi Jeep family, unfortunately after only 4 years and 49,000 miles I'm getting new left and right cylinder heads because of worn cams and lifters. I never abuse her and changed the oil with Penzoil Fully Synthetic every 5k. My question to the people in here much smarter than me is should I switch to AMSOIL fully synthetic which advertises 75% less wear? I don't mind paying the higher cost as long as it's not a scam. Thank you in advance.
Steve, Bronx N.Y.
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OldGuyNewJeep

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I put Amsoil is the same category as oil catch cans and cold air intakes: a fool and his money are soon parted.
 

azwjowner

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Amsoil makes excellent oil, but oil is overdebated. If you set up a 15 year test with thousands of Jeeps running different brands of quality synthetic oil, I would be stunned if any significant differences in engine wear or longevity were found. More key would be interval, driving habits, etc.
 

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CarbonSteel

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Increase the viscosity to xW-30 or xW-40. I use Mobil 1 ESP 0W-30 in mine and have a friend who has ran 0W-40 in his from the first oil change. He has nearly 115K on it now with zero issues.

Upping the viscosity will provide more protection than Amsoil ever will. They make great gear oil, their motor oils are overpriced and overrated.
 

SouthCo

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Pennzoil Platinum Full Synthetic is great oil and using something else wouldn't have prevented what happened. I use Pennzoil and my wife's 2018 Toyota has 120K trouble free miles. Yes she drives too much lol... Our 2013 Honda has 150k trouble free miles.
 

JJMalone

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Don’t think there is anything wrong with Amsoil but I have ’20 JL 3.6 with over 146K miles. Used nothing but Penz 0w20 and Mobil 1 0-20 and zero problems. Changed way too often and never loaded the motor very much until it was thoroughly warmed up. Remember first number (0) in 0w-20 is the viscosity when cold and 20 is the viscosity when hot. I’m one of those people that believe the factory engineers know more than the consumers and are most likely honestly recommending the oil specifications for the best service life and economy out of this drive train.
 

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grimmjeeper

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Don’t think there is anything wrong with Amsoil but I have ’20 JL 3.6 with over 146K miles. Used nothing but Penz 0w20 and Mobil 1 0-20 and zero problems. Changed way too often and never loaded the motor very much until it was thoroughly warmed up. Remember first number (0) in 0w-20 is the viscosity when cold and 20 is the viscosity when hot. I’m one of those people that believe the factory engineers know more than the consumers and are most likely honestly recommending the oil specifications for the best service life and economy out of this drive train.
Being an engineer myself, I will say that engineers aren't always allowed to make the best engineering decisions for reasons that have to do with economics or outside influences. For example, the move to 0W20 is more about reducing the effort needed to run the oil pump for the purposes of improving fuel economy. And it's enough to keep the engine from self destructing before the warranty is done. At least most of the time. From a strictly engineering standpoint independent of the pressures of CAFE regulations and what not would be to have a thicker oil for longevity.

As engines age, the internal friction wears parts and tolerances open up. You really do need to up the oil viscosity as the engine gets older. 0W30, maybe even 5W30 is a better viscosity for an engine that has 100K+ miles on it.
 

UncleJimmy

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I have done extended oil changes with Amsoil 0w-20 Full Synthetic (according to the Amsoil label) in my Tundra and am at 143K mi, no issues. I also use their gear oil and I think I picked up about 1 mpg over the stock Toyota gear oils.

I have no issues with their sales model. Doing my own changes and extended oil changes I save time and money in the long run.

 

The Last Cowboy

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I just did 5w30 from the get go.

As far as Amzoil and other boutique oils, there is no magic in them. Browse the forums and threads on www.BITOG.com to see.

A while back there was a guy at work, seriously skilled gearhead, who was selling Amzoil and singing it’s praises. He was running it in his personal truck for the 25k advertised miles. At around 23k miles on the oil he spun a bearing and threw a rod. I never bought any, as I saw it as the Amway of oil.

Pick a quality full synthetic and change it a 7-8k miles and you will be good. Also, use a quality oil filter which is changed each time the oil is changed. Don’t go by the oil life monitor, it just calculates and algorithm, no vehicle sensor can analyze oil.
 

Petey

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Hi Jeep family, unfortunately after only 4 years and 49,000 miles I'm getting new left and right cylinder heads because of worn cams and lifters. I never abuse her and changed the oil with Penzoil Fully Synthetic every 5k. My question to the people in here much smarter than me is should I switch to AMSOIL fully synthetic which advertises 75% less wear? I don't mind paying the higher cost as long as it's not a scam. Thank you in advance.
Steve, Bronx N.Y.
It looks like they haven't gotten over valvetrain issues still... after all the cases over the years . This is a manufacturer problem ..not an oil problem . Ridiculous but typical of chrysler.
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