Is 5500 miles too much for Kendall syn-blend?

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I'll bet even Trop Artic could do 5,500 miles
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Originally Posted By: SR5
Yep, or one reasonable oil brand / grade to another, assuming both are suitable.

Exactly. If one specified brand or variety of oil was doing much better than another, we'd have heard about it long ago. And if the lubricant isn't pushed beyond its service life, it isn't pushed beyond its service life.
 
Originally Posted By: Merkava_4
Originally Posted By: UltrafanUK
The only way you are going to know if the OCI is OK for sure is to get a few used oil analysis done.


That's what all you guys say when you don't have the guts to tell the OP that 5500 miles is too long.
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This was my main concern
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Napa synthetic has a weaker add pack than normal synpower.


Napa synthetic is not weak in the calcium and sodium additives compared to Synpower because they are about the same. Look in VOA section for NAPA synthetic that I had sampled not long ago.
 
Originally Posted By: Garak
The chances are slim to none, Merk. The taxis went 6,000 mile intervals on conventional instead of the 3,000 mile severe service intervals at the time. The bodies fell apart around the engines. I don't think we've seen the slightest bit of evidence we get any significantly enhanced engine life by going from one reasonable OCI to another, assuming both are suitable.


You didn't change the oil in your taxi until 6000 miles ? Are you serious ? Are you seriously serious ?
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Originally Posted By: Merkava_4
Originally Posted By: Garak
The chances are slim to none, Merk. The taxis went 6,000 mile intervals on conventional instead of the 3,000 mile severe service intervals at the time. The bodies fell apart around the engines. I don't think we've seen the slightest bit of evidence we get any significantly enhanced engine life by going from one reasonable OCI to another, assuming both are suitable.


You didn't change the oil in your taxi until 6000 miles ? Are you serious ? Are you seriously serious ?
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I don't believe that Taxis have severe service. They're warmed up all day long. Not hot-rodded either because you can't drive like that with a customer.
 
My big question is why is Kendall GT1 high-performance synthetic blend not dexos approved??
 
Originally Posted By: NHRATA
My big question is why is Kendall GT1 high-performance synthetic blend not dexos approved??


The Kendall GT-1 with Titanium is not Dexos approved.

The Kendall GT-1 with Dexos approval has no Titanium in the mix.

You can get either, but not both in the same package.
 
Originally Posted By: Merkava_4
You didn't change the oil in your taxi until 6000 miles ? Are you serious ? Are you seriously serious ?
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Very serious, Merk. The recommended interval at the time was 3000 miles, and we went 6000, and it was oils not nearly as good as we get today. And, they were conventional, too. Now, as Nick indicates, I, too, don't call taxis exactly severe service, since they're always at operating temperature, so few concerns about condensation in the oil, or cold starts, or any of that.

But, none of the engines wore out before the bodies. The longest run we had was a 600,000 mile Impala, driven to its retirement spot on the farm because the body had simply had enough. And, when I did cam and lifters on it a couple hundred thousand miles into its service life (they all went through cam and lifters then), there was no horrible sludge or me sitting there for hours cleaning things. It wasn't as clean as I know you like things, but when you do the math on cutting the OCI in half over that kind of service life, you can see things get pretty expensive. An oil change would cost roughly $7.50. So, we basically had 100 oil changes for $750. There is no financial reason whatsoever to halve the OCI and spend an extra $750, considering the engines were never the limiting factor on the taxis' service life. For an extra $750, I could have had an extra engine sitting on a stand, ready to go in, in case of an engine wearing out that never happened in the first place.
 
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