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  #46 (permalink)  
Old 08-12-2004, 10:14 PM
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This is slightly off topic......
Since we have all the oil experts attention.... My 235 is losing oil out of many places. It has the old downdraft crankcase tube. Someone suggested this was clogged and causing pessure to build in the crankcase which is causing the oil leaks. Any suggestions? I used regular 30wieght oil when I changed it. I also used Duralube.

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  #47 (permalink)  
Old 08-12-2004, 11:10 PM
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Well...... have you checked it? If not then check it.

Troy
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  #48 (permalink)  
Old 08-13-2004, 07:24 AM
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Well this topic got my attention. Ive been using Pennzoil for years and cant say Ive noticed a sludge problem, I do change my oil on schedule though. Last year I started using synthetic oil in one of my rides and have been impressed with how clean it looks. It costs a little more but I think its worth the extra protection & performance. I plan to start using it in everything.
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Old 08-13-2004, 08:08 AM
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a technician at the local oil distributors, who carries all the major brands, told me that in the 60's and early 70's (when Pennzoil came from Pennsylvania it had i high ash content and would sludge or cake more easily than lower ash content oils, but Pennzoil changed the refining process to help filter out the ash and it hasn't been a problem in decades.
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Old 08-14-2004, 06:39 PM
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Pennzoil NO Good

I have much first hand experience with Pennzoil. I work at a national oil change facility. WE do about 50 cars a day, most which get pennzoil. Even after 3 thousand miles the oil comes out burnt. Pennzoil's level of protection to your motor is none. It has almost no resistance to thermal breakdown. The cars that run the hot, like the ford's for example, the oil is complete sludge. I can't even explain how terrible it is. DOes it sludge, with out a doubt.
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  #51 (permalink)  
Old 08-15-2004, 02:02 PM
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Pennzoil and sludge

I seized a 455 Olds using Valvoline 10 w30 around 1980. I only use penzoil ever since. I never had a sludge or any oil problem since.

PS I an leaning a lot from this site
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  #52 (permalink)  
Old 08-15-2004, 07:46 PM
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Back in the 80s I asked the guy who built our race car engines what was causing the sludge I was seeing. He said it was a combination of things. Number one he said he would almost guarantee the engine was running Penz, too long between changes and too cold of thermostat which didn't let the vapors and other oil pollutants to go out through the crankcase ventilation.
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  #53 (permalink)  
Old 08-16-2004, 01:20 PM
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modern oils have to pass certain spec and regulations in order to be sold by the manufactures. This is to insure the quality of the oil that is used, so most modern oils are pretty much the same.

I never had a problem with quaker state or pennzoil but I was told by my dad that he never used to run quaker state becuase the parafin in the oil used to sludge the racing motors. Supposedly this problem had to due with the fact that the oil was coming from Pennsylvania.

Also most oils are made by only a few big name companies, I know this since my dad worked for an oil company about 15 years ago. A lot of your off brands and gas station oils are made by large manufacutures and bottled and labled under specific names. These name brands actually change producers and actual oil companies depending on contract prices for the production of their products. So you may buy your brand name oil but if they don't produce it themselves you actually may be getting oil company A one time and oil company B another.
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  #54 (permalink)  
Old 08-24-2004, 05:33 PM
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already answered the pennzoil Q but just want to let anyone who's read to the end of this post know that i went to napa and picked up some non detergent oil for my new engine. after i put in one quart i looked at the back of the container. it said "not for use in modern automobile engines". hahaha!
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Old 08-24-2004, 08:36 PM
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Modern Oils

I hear yah ,just bought plugs for my 2001 Escape ,$5 a piece !
Not to mention the $5/qt 5w20 oil !Inflation ?
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  #56 (permalink)  
Old 09-05-2006, 03:49 PM
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Quote:
Originally Posted by troy-curt
The worst sludged engine I ever tore down was using Pennzoil.
But that was in the 70s

Troy

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thats funny pennzoil is the only one that wont stain a motor inside. iknow people who switched to pennzoil and it cleaned sludge out
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  #57 (permalink)  
Old 09-05-2006, 03:52 PM
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Quote:
Originally Posted by poncho62
Pennzoil doesn't cause sludge......................laziness (not changing the oil) does..............................
i cant say it any better
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  #58 (permalink)  
Old 09-05-2006, 03:55 PM
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Has the new owner ship of Penzzoil by Shell had much of an effect of the quality of the Pennzoil oils in the USA?

I have heard of people here in Australia that have stoped using it once that all came out as Shell oils were said to froth up alot.

Hey just what I heard anyway.

Last edited by Francis; 09-05-2006 at 04:00 PM.
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  #59 (permalink)  
Old 09-05-2006, 03:56 PM
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Apparently the Cold Case Detectives have been working on this one.
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Old 09-05-2006, 04:01 PM
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Quote:
Originally Posted by Francis
Has the new owner ship of Penzzoil by Shell had much of an effect of the quality of the Pennzoil oils in the USA?

I have heard of people here in Australia that have stoped using it once that all came out as Shell oils were said to froth up alot.

Hey just what I heard anyway.
ive seen pennzoil froth up only in a ford
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