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Engine oil ??

Unless they have charge it penzoil is a wax based oil so it leave a sludge build up on every thing. The Havalon if my info is right is pretty much the same as Valvoline. If my info is correct the 2 are made by the same company but I can not be 100% sure of that info
 
Havoline was Texaco which was bought by BP?
My father used it and it seemed to make a bit of sludge. However that was a long time ago and I suppose it has changed a lot.
 
I ran Pennzoil in my Suburban for 200K+, my F-150 for 250K, a Dodge Stratus for 225K and a Ranger for 185K and haven't seen any sludge problems. Maybe I just got a good batch.
 
This topic has been brought up many times before. Everybody is using different oil, no one is having any problems. I use the cheapist stuff I can find.
 
The only Havoline motor oil I ever used was straight-weight HD, or high detergent. In MY experinc, when changed at 2,000-3,000 mile intervals, as we did back when I was running it, it left no deposits behind.

Pennzoil used to be more of a paraffin-based oil, and unless changed at regular intervals it tended to leave some sludge. Modern Pennzoil claims to have some sort of "clear base," but I don't know it that's just marketing hype.

BUT...if changed at proper intervals, EITHER would make a decent-enough engine lubricant. Buy a motor oil that meets or exceeds the specs required for your engine, and change it regularly, and I think you'll be just fine.
 
Each company produces different grades of oil. Which oils are you comparing?
As long as the oil meets spec. The "best oil" debate is similar to comparing the merits of Coors vs. Bud.
 
Slug is in all oil pans for those who FAIL to do proper maintenance per that manual in the glove box. NO manual or not a reader just mark on the wall any wall when the last times oil was changed at 3000 miles and you will get 200,000 mile runners. Nuff said - Cheap can be good????????
 
my vote for the cheapest also,...lottsa miles and lottsa hours on equipment and no oil related engine failures,..my guess is they all siphon from the same bulk tank...
 
I run penzoil in everthing and have for the last 35 years with Zeor failure. Several vehicles with 200,000 plus miles. Engines ran fine but the salt ate the bodies and frames till they would no longer pass inspection.
 
Oils are almost all low spec blended these days.
They are blended to use the least amount of additive possible. It is just like gasoline blending, an 87 octane is just that, an 87. The more you pay the better the oil. Do you need it? Watch yourself with the cheap ones. Synthetic is the way to go. If you can't afford a full synthetic then use at least a semi synthetic for real protection.
www.fuelsandlubestechnologies.org
 
If they both meet the current API standards of SM/SN either will take your vehicle to 300,000 miles,get witch one's cheaper at the time.

i used to lean toward Havoline because it had a nice slug of Moly(anti-wear additive) in it but it's since been lowered with currant formulations but still a quality lubricant.
 
Havoline is not the same as it was years ago. Been bought and sold and cheapened up along the way. Havoline products of the past and especially the oil had a distinct smell that identified it as a detergent working trademark of excellent lubrication quality, however, as said it is not the same and I no longer use it; my usual choice is Castrol and when not available I use Pennzoil and # 3 is Valvoline MAX LIFE.
 
Dad had a 1970 Plymouth Fury III, that had Pennzoil in it for most of its 200,000 miles, never had a problem. BUT, we replaced valve cover gaskets on a Ford that had inches of crud in the covers-had also run Pennzoil. We have not used Pennzoil after seeing that!
 
As a mechanic, I could always tell an engine
that was using Pennzoil, as it was always full
of a grey sticky sludge !
 
Depends on the gas engine (no one asked that). I assume its a car or light truck.

Cars, neither Havoline or Penzoil,

I'd run AMSOIL (synthetic) or Castrol (non-synthetic)

In light vehicles DO NOT run diesel oil like some do. You do not need the 15W or the 40 weight in modern gas engines.
 
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