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View Poll Results: Pick more than one that fits you habit
Pennzoil 7 10.00%
Mobile 21 30.00%
Other Major brand (Valvoline, Castro or Quacker) 26 37.14%
It doesn't matter I use what Brand is on sale 8 11.43%
Conventional 19 27.14%
Semi-Synthetic 5 7.14%
Full Synthetic 29 41.43%
Change Every 3000 Miles or less 20 28.57%
Change Every 4000-6000 miles 35 50.00%
Change over 6000 miles 9 12.86%
Multiple Choice Poll. Voters: 70. You may not vote on this poll

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Old 05-23-2012, 08:39 PM   #31
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Penzoil 10w-30 and Purolator filter every 3-4K miles. I've used Penzoil for 37 years, and have never experienced any major engine failures. The highest mileage I've had before trading was ~285k. The wife's Monte has ~170k on the clock, and was bought new. It's never seen anything but Penzoil, and runs like a clock (Digital, since no ticking is involved). I doubt that it matters what oil you use, as long as it is changed regularly. Filters are a whole different story.

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Old 05-23-2012, 08:42 PM   #32
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There are bad oils. They are always these small no-name brands (not the small exotics). There are several with such low viscosity that they can instantly harm your engine. Best to stick with the big names and the exotics (redline, Motul, Motorex, Total, etc)

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Old 05-26-2012, 10:05 AM   #33
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Mobile 1 HM @ 5000 miles Napa gold or Donaldson filter
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Old 05-26-2012, 10:25 AM   #34
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Valvoline, cause I like their commercials.
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Old 05-26-2012, 05:50 PM   #35
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Another good one is the Valvoline Durablend. Solid UOAs.
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Old 05-29-2012, 10:47 AM   #36
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I'm running Pennzoil HM 10w30 right now, next change will be Quaker State Defy. I usually stick with Pennzoil or Quaker State in my Jeep & Silverado.
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Old 10-02-2012, 11:15 PM   #37
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Mobil1 0-40 full syn,change every10,000 miles, Mobil 1 filter. If not that Mobil1 5-20 extended performance still change at 10,000 miles. I read everything I could find on oil when I had two Miata's. Started with Amsoil-it is not without it's own issues and is generally more expensive than M1 and obviously harder to get. Like I said you can read about this stuff for hours including lab tests and engineering studies but the bottom line is full syn M1 and change at 10k. You can go to 13k or so with no harm but things do start to degrade at 10k ever so slightly. My Mercedes typically went 12 to 13k between a change was called for from the on board computer. I lived in Phoenix! Admittedly, the Mercedes held nine plus quarts of oil. Stop wasting your money on too frequent oil changes. BTW 10W-30 full syn is a meaningless number as it relates to DINO oil. It is also a poor choice. Go with one of the two I mentioned at the start. It is made up so the consumer thinks he knows what he is buying.
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Old 10-03-2012, 08:34 AM   #38
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Quaker State Defy, 10W-30. 3000-5000 miles or 3-5 months. (this is a syn. blend with about 900 ppm "zinc" according to what I read.)

QS is a SOPUS (Shell) product same as Pennzoil.
The only thing Pennzoil has in common with the old Pennzoil is the yellow bottle since 2002, when Shell bought the name and reformulated it. I think it is one of the best out there now. I see a lot of bagging on PZ from people who cheerfully use Shell motor oils like Rotella, but it's the same company now.

Besides, a lot of old engines sludged regardless of what oil was used, and since Pennzoil was the one of most used oil brands, I strongly suspect that even the old Pennzoil got unfairly blamed for that most of the time.
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Old 10-04-2012, 09:52 AM   #39
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Quote:
Originally Posted by Blind Dog View Post
Quaker State Defy, 10W-30. 3000-5000 miles or 3-5 months. (this is a syn. blend with about 900 ppm "zinc" according to what I read.)

QS is a SOPUS (Shell) product same as Pennzoil.
The only thing Pennzoil has in common with the old Pennzoil is the yellow bottle since 2002, when Shell bought the name and reformulated it. I think it is one of the best out there now. I see a lot of bagging on PZ from people who cheerfully use Shell motor oils like Rotella, but it's the same company now.

Besides, a lot of old engines sludged regardless of what oil was used, and since Pennzoil was the one of most used oil brands, I strongly suspect that even the old Pennzoil got unfairly blamed for that most of the time.
I think that Pennzoil & Quaker State are 2 of the best oils on the market. SOPUS has done a great job with them, really turned QS around. IMO.
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Old 10-04-2012, 10:07 AM   #40
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Quote:
Originally Posted by Noshow13 View Post
I think that Pennzoil & Quaker State are 2 of the best oils on the market. SOPUS has done a great job with them, really turned QS around. IMO.
I agree. I wouldn't have used them 10-12 years ago, but I'm sold on them now. Seen a lot of great UOAs and VOAs and their add-packs are outstanding, especially their top line Pennzoil. I'd put them up against anything in their class.
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Old 10-08-2012, 02:39 AM   #41
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i use strictly amsoil.in my 2011 impala i run 0w-30 100% synthetic/in my 2008 wrangle with a 3.8 i use 5w-20 100% synthetic.i use amsoil ea filters.it is stated that the oil chnage is at 25,000 and to chnage the filter at 12,500
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Old 10-08-2012, 07:56 AM   #42
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I think Amsoil is a good product. I used to sell it on the side for extra money until I didn't have time for that anymore. I would still sell it to a friend or use it myself.

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