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Great thread! I did some research after reading it and now know a lot more about the various groups of base stock. I'm leaning toward saying a group II or III WITH a good addative package is the way to go. Common sense says this would be best, but actual oil anaysis may not prove it. Hmmmm....
I used Pennzoil in a car about 10 years ago. I put 180K miles on the car using Pennzoil 10w-40. I haven't used it since but would without question. I use Shell right now and have for the last 2 or 3 years.
Validation is not a objective here. Proving what works and what doesn't is my goal.
Both Chevron Supreme and Motorcraft, especially in 5w30 look really good here. Both are hydroprocessed or hydrocracked and sell for less than many of the other top dinos. And Walmart always has plenty of the Motorcraft 5w30 in stock...just when I thought I had settled on an oil, you all have me scratching my head...but its fun and interesting!
Well, then, if you believe that the formulation has not changed in 10 years, then I have a bridge for sale...
And, if it hasn't changed in 10 years, then it is most definitely a substandard oil for use today. Unless, of course, your vehicle is at least that old, too.
It is my understanding that Pennzoil (which has been around, oh, somewhere in the neighborhood of a hundred years) was an innovator of additives, "Z-7" being highly acclaimed for many a year.
Now their "Purebase" sorta "covers" them on the other end of the scale of this thread -
Ain't for `em - just them same, I ain't agin' either - I believe it's safe to say they have a "clue" about mass producing decent quality lubricant's - - - and now, teaming w/ QS (also been `round the block "awhile") and Shell taking over that deal - I'd say - LOOK OUT! - High potential for very high quality, up & coming products.
Yeah, and as as soon as you get it all figured out and get comfortable with your choice, Mobil will introduce their new 0w20 Mobil 1 SuperSyn oil that meets Ford's WSS-M2C-153H standard. They've announced it will be in retail stores this coming March.
What would you guys think about doing a test on some dino oil that's approximately about 15-20 years old that's still in its original can, and comparing it to the same dino of now?
I just happen to know of some one (me), who has some cans of 10w Mobil of about a 20 year vintage (I think that I may also have some 30w too), that would be able to do such a test in a couple of weeks.
I really think that this would be interesting to see what the differences are, don't you guys?
Not meaning to "strike an expired equine" (p.c. version), I just bought some Motorcraft 5w30 at wally world for everyday price of $1.33 qt. This is the newer red bottle meeting SL/GF3 specs. It advertises "synthetic/hydrocracked base oil". I'm thinking this means a group 2 or 3 or a combination of the two to claim synthetic. This may be another example of a great value.
Hey mikemc - does it say "semi-synthetic" or "blend" on the bottle - and didn't you just buy a case of Castrol GTX about a month ago? Man you must be getting stocked-up pretty well w/ motor oil -haha!
And SuperRangerMan2002 - man that would be nice - but I think I'd have to save those "cans" as collectors items - might be worth a pretty penny to someone - some day (?) ...
Glenn, it doesn't say synthetic blend on the bottle (as it does with the 5w20) so I'm guessing its a group 2 or 3 dino oil. Yea, I can use the Castrol in the wife's car.