Duke question??

[Joe L.]

Re: Duke question??

How would a motor oil re-processor obtain a base of only synthetic oil to begin with in order to produce a re-cycled synthetic? This would indicate that lube shops seperate syn motor oil from diesel motor oil from other oil motor when draining crankcases which I don't believe happens. The plant process of separating syn oil from other motor oils would seem to be a rather involved process. I know such a process never came up in Chem I, Chem II or Organic Chem back in the day. May be time for a course in Chem TDB!
Best regards,

Charlie-----

Keep in mind that synthetic motor oil is made from "something". That "something" is not gasses taken out of the air, an agricultural product, or a material extracted from seawater. That "something" is petroleum, the same stuff that conventional motor oil is manufactured from.

However, in the process to manufacture synthetic oil the petroleum is broken down into more basic, "smaller" hydrocarbon molecules and, then, "built back up" into the synthetic base stock. The "feedstock" for the whole process could probably be a whole host of hydrocarbon materials, from crude oil to used engine oil to liquified petroleum gas.

In this case, I expect that the waste engine oil is used as the feedstock or ONE OF the feedstocks for the process to manufacture the synthetic oil. Such as it is, when the process is complete I don't think there would be any difference between a synthetic oil manufactured from used engine oil or a synthetic manufactured from crude oil.

This is NOT the same thing as conventional motor oil manufactured from waste engine oil. In that case, the oil is simply re-refined and/or "cleaned up". At least until fairly recently, if not right to the present, most used engine oil is used as a fuel for refineries and is not re-refined into motor oil.

[Joe L.]

Re: Duke question??

no matter what you decide if you have a GM car under the factory warranty and use synthetic oil it had better meet GM spec GM4718M or they could deny your warranty claim. GM4718M would be printed on the bottle.

clem-----


Yes, and not all synthetic motor oils meet the GM 4718M standard. To make things even more confusing, not all that meet the standard so-state on the container.

Just because a motor oil meets the current API or SAE standards, DOES NOT MEAN THAT IT MEETS GM 4718M. Mobil 1 does.

[Clem Z.]

Re: Duke question??

clem-----


Yes, and not all synthetic motor oils meet the GM 4718M standard. To make things even more confusing, not all that meet the standard so-state on the container.

Just because a motor oil meets the current API or SAE standards, DOES NOT MEAN THAT IT MEETS GM 4718M. Mobil 1 does.

gmtechlink has a list of synthetic oils that meets GM 4718M and GM 6094M which is the approved non synthetic oil

[Dale S.]

Re: Duke question??

Years ago, There was a place down on south Broadway in Albuq. called Mesa oil company. They took used oil and put it thur strainers and it came out looking like clean oil. I was in high school and had no money for gas let alone oil. It was put in glass containers with a screw on lid, similar to a Ball canning jar. there was a metal rack( like the milkmen used to deliver quarts of milk in) that held 6 quarts of oil. I carried this rack of 6 of these in the trunk of my 48 DeSoto. I think regular oil was then 50 cents a quart and this was 10 cents a quart. I was working for 50 cents an hour. (good money for then). My Dad said it looked like I was fogging for mesquitos when I went off to school. The population of Albuq. was 35 thousand. Dale

[Tom S.]

Re: Duke question??

I still have 1 question, is anyone or oil supplier allowed to sell used oil as new. I don't think so, but I would like someone to confirm it! Tom

[Clem Z.]

Re: Duke question??

Years ago, There was a place down on south Broadway in Albuq. called Mesa oil company. They took used oil and put it thur strainers and it came out looking like clean oil. I was in high school and had no money for gas let alone oil. It was put in glass containers with a screw on lid, similar to a Ball canning jar. there was a metal rack( like the milkmen used to deliver quarts of milk in) that held 6 quarts of oil. I carried this rack of 6 of these in the trunk of my 48 DeSoto. I think regular oil was then 50 cents a quart and this was 10 cents a quart. I was working for 50 cents an hour. (good money for then). My Dad said it looked like I was fogging for mesquitos when I went off to school. The population of Albuq. was 35 thousand. Dale

same with my first car 1934 dodge as i bought oil in 2 gallon cans and always had it with me.

[Duke W.]

Re: Duke question??

I still have 1 question, is anyone or oil supplier allowed to sell used oil as new. I don't think so, but I would like someone to confirm it! Tom

You mean used oil that hasn't gone through processing to clean it up?

I doubt it, and if you stick with name brands including house brands of major retailers like big box and auto parts stores there is no need to worry about product quality as long as the packaging has the API certification "donut" and a certification that is correct for the application.

Some years ago I was told by a reliable source that used oil in Southern California was filtered and mixed in small quantity with bunker oil used in ships. Back then I think it was called "Bunker C", but it is now known as No. 6 fuel oil, which is the heaviest grade of fuel oil. It has to be heated to about 100-120F in order to make it flow properly through the fuel systems of large marine diesel engines.

Duke

[Jeff A.]

Re: Duke question??

Why synthetic?

I just bought a gallon of SuperTech 15W-40 CI-4. The label just says "manufactured in USA for Walmart Stores, Inc", but doesn't say who.

I hope you aren't using an S-category oil.

Duke

Duke...
when you say don't use a S category oil, do you only mean the latest - SM?
What if you have oil purchased years ago rated SL - would that still be safe to use?

or what about the oldest ones SG SH SD SF - some of these oils have not been produced in decades.

Here is a PDF of some of the old ratings ---> http://www.tnk-oil.ru/doc/doc.asp?obj=70095

Just that I have a lot of old cases of oil stashed away - and I really believe I should be able to use these safely - without any worry at all

I bought SG Hiperf oil myself back in 84 -still have a case or 2..
Can't believe all s cat oils are bad?

[Duke W.]

Re: Duke question??

SL had a P limit of 0.10 percent. Prior S-categories had no P limit, but the base stocks aren't as good.

But the biggest issue I see is that your oil is years or decades old. Oil has a shelf life (see the Corvette Restorer for my oil recommendations including all the whys and wherefores and look at the Web references for shelf life recommendations). I recall one old partially filled oil bottle that I had for several years that I finally used to top off one of my cars. The bottom had a black film - probably additive drop out.

I don't recommend inventorying more than a two-year supply.

Duke

[Jeff A.]

Re: Duke question??

maybe it has something to do with the fact that it was opened?

This 1982 Spectro 4 -- 10W40SG, Looks as fresh as the day I bought it.
It was designed for 4 stroke Motorcycle engines - and the bottom of the white containers show no contamination at all.

Even my 5 year old 20W50 SL shows no degradation.

I have a case of 40 year old purple stuff in the metal cans - that I might not want to use - but I can't believe if it is kept sealed that this stuff would go bad?

[Tom S.]

Re: Duke question??

My question still remains. Does recycled oil have to be marked recycled oil??Some of the oils in Wally World say recycled on them. The full msynthetic does not. Tom

[Clem Z.]

Re: Duke question??

My question still remains. Does recycled oil have to be marked recycled oil??Some of the oils in Wally World say recycled on them. The full msynthetic does not. Tom

it may have something to do with the % of recycled oil used.

[Michael F.]

Re: Duke question??

love the good ole days and cheap oil and gas, for me oil was 30cents qt, gas average 30cent for regular
on old, old oil, why even chance it is my question.

[Joe L.]

Re: Duke question??

love the good ole days and cheap oil and gas, for me oil was 30cents qt, gas average 30cent for regular
on old, old oil, why even chance it is my question.

Michael------


According to the AAA the national average price of gasoline today is $2.29/gallon. Adjusted for inflation since 1964, that's equivalent to $0.29/gallon in 1964 dollars. So, on an inflation-adjusted basis, gasoline is less expensive today than the the $0.30 you mention.

[Mark E.]

Re: Duke question??

I only have two questions-

1. Why is Clem banned? Did he use the F*rd word on the forum?

2. If he's banned, why is he still able to post on our privileged forum?