Ok I know the debate over motor oils and the formulations.... Put that aside for a bit, I have a question.

Starting off with, "If you had 'discovered' a case (for chits n grins a REAL case 24 frigging quarts dammit not 12, which is another story in itself ) of say your Favorite Oil that you used to use mmmm for sake of argument Castrol GTX 10w40, that has been shuffled here there and wherever, that was purchased say in 1995, would you use it?"

Reason I ask, is my youngest son works at a brand new convenience/gas (opened in last 3 months or so) and a customer brings in a quart of oil complaining that it has 'expired'. HUH? Motor oil "expiring" I have never thought of it EXPIRING, and havent looked at a quart of oil CLOSELY i suppose but didnt KNOW it had an expiration date, much less one printed on the label. Think he said this oil had a date of 05/20/2012 or something.

I know you probably wouldnt use the "found" oil in a really new car (2000-up) or so, but for an older daily or maybe the 1970 dart you have.

Any one wanna chime in? SSD? Doc?


BTW I will report the poll results in 30 days. Was just curious is all. After thought the results can be seen anyways. (DOH!) Poll is to run 30 days.

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MRO....

Cheap, Fast, Reliable.... Pick 2...

If you could say with confidence the motor oil never so cold that waxes precipitated out then I would use it, for around 3k miles.

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Joshua

I would use it in one of my high mileage DD cars, with-out a second thought.
I would not use it in my race car's engine.
DD

Sorry Joshua, was adding the poll as you were replying....

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MRO....

Cheap, Fast, Reliable.... Pick 2...

Josh: So if I park my car outside some January night, and temperature plummets to a seasonable -15 degrees below the doughnut, I will have an oil formulation problem the next morning? Hundreds of thousands, no, millions of cases of motor oil have been trucked all over the state during cold weather in unheated box trucks, or by rail for about a hundred years, I have never heard of a wax precipitation problem with this commodity. Back in the sixties & seventies we used a lot of Castrol 10w40 oil for above 30 degree weather operation of vehicle; it was all the rage back then. As were 3000 mile interval oil changes.

Inquiring minds want to know.

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC

use the Dinosaur juice!

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1964 Dart GT

Bill,

I've spent too much time on Bob is the Oil Guy. Searching there this was the best I could find in the time I allowed: http://www.bobistheoilguy.com/forums/ub ... ber=750802

I read something else there which stated that the wax which precipitates out doesn't always go back into solution and the waxes increase the oil viscosity. It was stated that this viscosity increase is usually not a problem in a vehicle which is used enough to get at least an annual oil change. That information did lead me to put synthetic oil in my generator as it was sited outdoors and was used infrequently.

There is more info, but you have to pay for it. http://journalofrheology.org/resource/1 ... horized=no

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Joshua

Understandable, but that said would the year model of the high mileage car play any role in the decision? (just curious is all) Or is it more of a mileage issue? Also understandable as many use their "pet" brand/weight of oil, and other than the factor stated is there any other reason for NOT using it in yer race engine? (altho I always used a single viscosoty oil in all my race stuff not multi.... ( my "pet" brand/weight when i dirt tracked WAAAAYYYY back when, early 80's for about 3 years then again in the early 90's for 3, i used Valvoline 50W Racing Oil) Used pennz in my cars, castrol gtx in my bikes. (street bikes)


All just curiosity questions and not being a brand pitch or anything. Thinking on my question now, maybe shouldnt have "branded" the oil in Original Question... Oh Well....

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MRO....

Cheap, Fast, Reliable.... Pick 2...

Josh that was an interesting read that appeals to my nerdly side. I do recall sometime back that Q State would wax up in these parts (1000 engines ruined per post), but suspect they have formulated their way out of that problem enough to stay on every discount store’s shelf in the country; I have never used it.

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC

1995 is still pretty modern. I'd use it in an older engine that was not seeing severe service.

Lou

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Home of Slant6-powered fun machines since 1988

LOL yeah I suppose it is. But when did the API ratings REALLY drastically change, or has there been a drastic change. (or more gradual)? Thats I am supposing the real question.

I do remember seeing differences in torn down engines when I was old enough to know really what was going on in engines as a comparo years ago about the Q-State v Pennz somewhere and the Q engine was NASTY..... cant remember if it was a sales pitch or what. I also remember from being younger the NASTY NASTY NASTY smell the old Havoline (Texaco) motor oil left behind. Man that stuff STUNK, after use. Anyone else remember those days? Dunno WHAT caused that but you could tell by the smell tearing down that it had used Havoline motor oil in it....



Hell after typing this I can imagine/remember THE smell... shhhhheeeeeeewwwwyyyyy lol

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MRO....

Cheap, Fast, Reliable.... Pick 2...

I remember some 80s oil being really crappy compared to 90s, and more variation between brands. Pennzoil and Q-state were like waxy foamy messes compared to Castrol and Valvolilne. I think now there is not much difference.

Lou

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Home of Slant6-powered fun machines since 1988

I have heard this many times, but have never personally experianced it. I ran Quaker State oil, exclusively in all my vehicles, including my race cars, and my Toyota PU, from 1974 till Quaker State changed to "Q" brand. The PU was from 1986, from 1st oil change on. Q-State sponsered my Valiant Stock eliminator car, and I stayed loyal to them even afterward. Never had an oil related problem.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

I wonder if it was a cold climate thing (WI is COLD). I remember seeing lots of goop in the crankcase in the winter mostly. Likely it was susceptible to soaking up water and foaming?? No, the car did not have a blown head gasket or coolant leak. Pennzoil was definitely the worst.

Lou

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Home of Slant6-powered fun machines since 1988

Yup, high mileage engines would make salad dressing like goo on dip stick if a lot of short hops were made never getting everything good and hot to evaporate condensate out of sump during cold weather.

Also exhaust systems lasted about two years in Maine, same thing; they never got dried out during the winter, and rotted from the inside out right along with the body.

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC