Is it true that Penzoil puts wax in their oil?

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S

Sluggo

Lifer
Jun 12, 2000
15,488
5
81
I wonder if its really from Pennsylvania, or thats just a clever marketing ploy.
 
BoomerD

BoomerD

No Lifer
Feb 26, 2006
66,002
14,402
146
Yeah, nowdays, I think it's merely labeled "Made from Pennsylvania GRADE crude oil". I used ONLY Pennz and Quaker State for about 20 years, but I kept noticing lots of deposits and "waxy deposits" when I'd tear down an engine, or even just look into the oil filler. I switched to Castrol about 10 years ago for most of my engines, an haven't had that problem since. I ran Mobil 1 almost exclusively in most of my BMW engines, as long as they didn't already have oil leaks. I used Castrol Semi-Synthetic with good results, (215K on a 96 Dakota 4-cyl.) but have gone back to full synthetic for the Expedition. (new 7-05)
 
DrPizza

DrPizza

Administrator Elite Member Goat Whisperer
Mar 5, 2001
49,601
167
111
www.slatebrookfarm.com
Most of their crude comes from PA, but some comes from near the borders. Wax is already present in oil; the refining process generally takes it out.
 
Slacker

Slacker

Diamond Member
Oct 9, 1999
8,623
33
91
Myth #1

Paraffinic oils cause engine sludge.
Oils from paraffin-based crude are loaded with wax and create engine sludge.
Paraffin base stocks cause sludge.
"x" Brand of motor oil causes sludge, varnish and/or engine deposits.
?Paraffinic? motor oils cause wax-like deposits on the underside of the oil fill cap.

Fact
There are two basic types of crude oil, naphthenic and paraffinic. Most conventional engine lubricating oils today are made from paraffinic crude oil. Paraffinic crude oil is recognized for its ability to resist thinning and thickening with temperature, as well as its lubricating properties and resistance to oxidation (sludge forming tendencies). In the refining process, the paraffinic crude oil is broken down into many different products. One of the products is wax, and others are gasoline, kerosene, lubricating oils, asphalt, etc. Virtually every oil marketer uses paraffinic base stocks in blending its engine oil products.

Many people believe the term paraffinic to be synonymous with wax. Some have the misconception that paraffinic oils will coat the engine with a wax film that can result in engine deposits. This is not true. The confusion exists because paraffinic molecules can form wax crystals at low temperatures. In lubricating oils, this wax is removed in a refining process called dewaxing. Wax is a premium product obtained from crude oil, and in order to ensure that we produce the highest quality base stocks available, Quaker State® removes the maximum amount of wax possible during the refining process. The end result is a motor oil product formulated with premium lubricating base oil.
Click to expand...
 
S

smitbret

Diamond Member
Jul 27, 2006
3,382
17
81
They don't put it in their oil, it's just there naturally. Oils have different levels of wax in them as their oils are put through different refining processes. 20 years ago, Pennzoil wasn't the best oil you could buy and the waxy build-up was fairly common in engines with 100k+ miles that had been using it. They've since changed a few things and if you change your oil every 3000 miles it really won't matter what motor oil you use (excluding synthetics) as long as it is ASE certified (look for the little round logo). More important now is what brand of oil filter you use.
-Brett
 
C

CraigRT

Lifer
Jun 16, 2000
31,440
5
0
Parafin..
Pennzoil is garbage, just like Quaker State

Use Valvoline or Castrol for dyno oils.
 
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