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Old 04-10-2010, 02:49 PM   #1
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Question Kendall GT-1 Synthetic Blend Oil - Is it Good?

Hi All,

Last week I trade-in my 2000 4 cyl. with a 2002 6 cyl. X model with 49000 miles. I am really enjoying the difference. I want to do the oil change at Firestone and have a question. They use Kendall GT-1 Synthetic Blend Oil and Kendall Oil Filter. Before I used Mobile1 but for now dont want to do the oil change by myself.

Is it a good oil? Any bad experiences?

Thanks in advance.

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Old 04-10-2010, 06:04 PM   #2
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I use regular oil and change it and the filter every 3k. It only cost me 14-15.00 to do it myself and have logged over 200k on my last 3 family vehicles. Clean oil is the best medicine IMO.

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Old 04-10-2010, 08:27 PM   #3
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When I get lazy, I use Firestone for oil changes. Kendall GT is good oil. I've never had an issue using it.
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Old 04-10-2010, 08:33 PM   #4
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As lazy as I feel, I would never let anyone touch my TJ or any of my other family vehicles. Espically the young untrained lube jockeys.
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Retired my 94 YJ 4cyl 5spd @ 200K
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Both as a commuter vehicle in NW, NJ
April 2012.downsized and now a 99er.
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Old 04-10-2010, 08:56 PM   #5
Really?

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Kendall GT-1 Synthetic Blend Oil - Is it Good?
I find it to be a bit nutty but leaves a fruity flavor on the pallet. It's better with white wine than with red.
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Old 04-10-2010, 09:25 PM   #6
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kendall oil is good stuff.used in all my hot rods and boats.but it costs more. never had an issue. but in my jeep i run castrol gtx.
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Old 04-10-2010, 10:43 PM   #7
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I'm running good old Valvoline with a Mopar filter...seems to work for me.

I used to run Mobil 1 oil and filters religiously...but after talking with numerous folks experienced with engines, it seems to me almost any oil is fine as long as you use a good quality filter and change it regularly. Sure cost me a hell of a lot less too. $15 total as opposed to about $40 before.
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Old 04-10-2010, 11:52 PM   #8
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Kendall is basically Havoline. Take it from me, my handle is not a coincidence.

That's 6 years with Jiffy Lube.
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Old 04-11-2010, 10:38 AM   #9
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All of today's modern motor oils are superb, there's not a bad major brand of oil out there. Though I use Valvoline, I wouldn't be bothered in the least if I were told I could only use Shell, Havoline, Kendall, Mobil, Pennzoil, NAPA, Chevron, etc. Heck, both Volvo and Mercedes had advertisements back in the 50's for their engines that were making it to the million mile mark... on engine oils from the fifties!
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Old 04-11-2010, 01:41 PM   #10
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I run Mobil one synthetic in my jeep...I also run synthetic in the diffs , transfer case and manual Trans.
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Old 04-15-2010, 12:13 PM   #11
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Thanks guys.
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Old 07-02-2012, 03:39 PM   #12
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Quote:
Originally Posted by Jerry Bransford View Post
All of today's modern motor oils are superb, there's not a bad major brand of oil out there. Though I use Valvoline, I wouldn't be bothered in the least if I were told I could only use Shell, Havoline, Kendall, Mobil, Pennzoil, NAPA, Chevron, etc. Heck, both Volvo and Mercedes had advertisements back in the 50's for their engines that were making it to the million mile mark... on engine oils from the fifties!
Those oils back in the 1950s were oils with high ZDDP (zinc and phosphorus) concentrations which protects engines from wear especially older engines or those with a flat tappet type of engine. Because the EPA has mandated that all new cars have a catalytic converter that is good for 100,000 miles of use, oil companies have been steadily reducing the concentration of ZDDP. The reason for this is that those converters get coated with the zinc and loose their effectiveness sooner as a result. Most modern oils contain no or very little ZDDP as a result of EPA pressure. Racing oils tend to have more. A ZDDP concentration of 0.1% or 1000 parts per million is the minimum needed by older engines in order to prevent wear. Someone basically put it this way: whether you use oil with a minimum of 1000 ppm means a choice between a $4000+ engine or a $400 converter.

Hope this has been helpful.
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Old 07-02-2012, 08:46 PM   #13
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More ZDDP is not needed with the type of low compression low valve spring pressure engines in our Jeeps. If we were running higher compression engines with heavy valve spring rates, I'd agree with you. But with the old-fashioned engines we run, that's not the case. If today's reduced amounts of ZDDP were a problem our engines wouldn't typically last the 250-300k miles they do before needing overhauls.

Enough hand-wringing over a non-existant problem where our Wrangler 2.5L and 4.0L engines are concerned.
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Old 07-02-2012, 09:27 PM   #14
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In the 1970's engine performance was on the up swing. Cams were bigger, compressions were higher and power was king. Then in the middle 70's the roof crashed in. Lots of changes by people who did not know what a law would do to the inside of a motor. Yes cam lobe interface pressures were sky high on flat tappet lifters. Cams went bad. The aftermarket cam MFG's came up with coatings and break in lubes. They still have them. Oil MFG's have not been still. Neither have the engine engineers. While roller tappets are much more in vogue today most OHC motors and older design inlines still use a flat style tappet arraignment. Modern alloys and processes make todays engines capable of many more miles than the good old days. Yes Zinc would be nice but it is not here unless your willing to sacrifice a Cat Converter for it. Quality oil and filters along with regular changes will extend the life of our jeep motors to well into the 100,000+ range easily. So unless someone has a zinc tolerant converter I don't see us going back to it as an additive anytime soon.

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