so what if I mix rum and coke with 5w30? what'll I get then?

We had a party last night for a bunch of new pilots who just qualified at the boat. It was a Big Lebowski theme. Everybody was drinking caucasian's and they ran out of Kahlua. Somebody mentioned just using cream and chocolate syrup, so that's what we went with... not bad.

Zarish, I think you might be missing a big part of the oil nomenclature. 10w30 doesn't mean it's half 10 and half 30. The viscosity of the oil will change as it's temperature changes. When the oil is cold, it's viscosity will be very thick, which aids in getting everything coated very quickly on startup. As the oil gets hot, it gets thinner, allowing it to flow better through the engine when it's running faster. That's why you should really let an engine get warm before you hammer on it.

I believe oil weight is measured at 0* and 100* for multiweight oils. That's celsius.

Why do you guys assume I or anyone else does not know what oil is or what viscosity is or that I am missing a big part of the nomenclature???? Anyways, I don't think you guys understand what I am asking. Next time you guys do your oil changes don't bother looking at what the tag reads, just put in any mixture of oil. A quart of 5W30, 10W30, 5W50, and another one of your choice. Who cares since its all the same anyways right??? Oh and forget about rum and coke, they are not even the same even though you mix it and drink it. If any of you ever are in a hospital and need blood, don't worry bout the blood they insert in you body, since the blood is all the same and the different blood types don't matter. Not trying to be an ass, but I do notice that on this forum you guys seem to know it all. Wonder why the forum even exist. Sorry if offended any of you guys, but this is the fact.

We assume that from the nature of your questions. That's the basics, so we figure coving all of them will net you where you want to be.

If your car is rated at 10w30, and you need a total of 5 quarts, than adding one quart of 10w30 and 4 quarts of say 40w50 isn't recomended.
It is probably better if you add oil close to your weight req.
IE: you need 10w30, so adding a bunch of 5w30 to your 10w30 wont do anything wrong. Adding 20w50 to it wont do anything wrong most likely, but why risk it?

We are all assuming the closer to the real req mix, the better, and the more of the right mix will allow you more breathing room to add diff. viscosities. But, it is all guesses as to what your motor will take.
1/5 being effed up has been proven not to really do much, especially since its only in 3 - 5k miles. Make it a habbit and who knows? change 4/5 of those quarts and see what happens. give us a good experiment to work with

"We are all assuming the closer to the real req mix, the better, and the more of the right mix will allow you more breathing room to add diff. viscosities. But, it is all guesses as to what your motor will take.
1/5 being effed up has been proven not to really do much, especially since its only in 3 - 5k miles. Make it a habbit and who knows? change 4/5 of those quarts and see what happens. give us a good experiment to work with"

I don't believe in mixing viscosities, so I am not the one who should be giving you guys the experiment to work with. Since most here think its ok, they have nothing to worry about and maybe one of them should try it and give us the experiment to work with...

I have made my point, and rest my case. Lets see who here wants to try running their motor this way and experiment.

Some advice to whoever likes mixing oils:

-Do not, however, mix synthetic and normal oils (unless the synthetic's manufacturer specifically says it's OK).

-Try to stick with the same brand and of oil since mixing brands might have different additives added to their oil and might not be compatible with another brands additives and minerals.

-Never mix detergent and non-detergent oils. An oil that is rated, say 10-30 or 20-50 with one that is rated, say, SAE30 or SAE20.

Try staying as close as possible with oil mixtures that are close to what is recomended run safely on the particular car, since after mixing two different oils you really don't know exactly what the resulting mixture's viscosity is.

No, you can't. It's impossible.

quick, someone tell zarish where 89 octane gas comes from.

whales

Considering what abuse our engines get, compared to the average use, we all should be running racing oils anyhow ;)
Ever considered that most racing oils seem to be 10-60 and the likes, pretty thick, pretty high temperature resistant.

Dont even know what i wanted to say from the start ;) but hell, climate can make you choose a different oil than recommended, just think before.

It really doesnt matter. I had an '83 Porsche with over 300k miles on it before I wrecked it. The motor casing was never opened up, not once. I just did regular maintenance on on it. Depending on the use of the car I would put different grade oils in it. When I wrecked it back in '04, I had 40 weight racing oil in it. Normally I ran 20w50. I will say the motor rev'd a tad slower and I got a tad less mpg with the heavier weight oil vs a 10w30 blend. But, who cares it was a Porsche. Now, we all have our Porsche kill stories, but there is something about owning one. Anyway, there was always talk among the Porschephiles that switch from dino to synthetic would ruin our seals. Not once did we ever see either affect our cars in a negative way.

But, if you are asking about grades of oil, viscosity and what ifs, then you dont need to run an aftermarket forced induction set up in your car. If you can't grasp simple oil concepts then may the Lord help you with anything REALLY difficult.

That sounds like an awesome party. Did you "do a J"?

It wont mess up your car at all. i had done that a few times. just make sure next time put the right oil in. lol we all have our moments

I had a 1981 Celica that leaked and burned oil like nobody's business. I was young and broke at the time and started reusing old oil. That car still ran when I donated it to charity. Had over 300,000 km. Pretty sure I mixed the oil couple of times. Never did change the filter.

Ok you got me beat. hands down. buddie of mine ran out of oil in his car, dumbass, and he was 40 mile from home and broke so he kept driving. when he did put oil in it, car ran fine.

lol thats funny. what did the charity think if there new BMW?:giggle: