its something about the WRX.... when i went to the dealership other day about to trade in my eclipse for a STi but the dealer kept telling me dont ever use full Synthetic oil for this car....as for evo u need to use full synthetic oil atleast thats what the dealership told me.....

 

I pay $7 a gallon (5 qts.) for dino oil (Exxon).
I pay $22 a gallon for synthetic oil (Mobil 1).

That's called a "sizeable difference."

Last I checked, the STI's were supposed to use Mobil 1. Maybe they changed something, maybe your dealer is an idiot (probably door #2).

 

That is a big difference, obviously. But if you look at it in terms of milage it's not so bad.

I mean, you don't change you oil everyday and is an extra $15 a gallon will give you that level of comfort and a small measure of performance then I'd say that's a good thing. Pretty similar to spending a little more on tyres or something. If you do low-normal milage on your car, then it shouldn't be too much cost compared to other things...

 

has anyone been able to confirm a case where synthetic did damage to a 4g94? Not a turbo or tuned 94, just a regular mildly or non-modified engine?

No, they haven't. Some members here have run this engine well over 100,000 miles on full syn with no problems.

The way i see it, a car is one of the largest monetary investments we humans make. Why would you ever cheap out on your car? You wouldn't feed your baby off-brand terrible baby food because someone on an internet forum had there kid die while feeding it good food right? It's much more likely it was the parent, or owner of the car, than the baby food who made a mistake.

 

A car is not an investment, a car is a money hole. Unless you buy a bentley, you will never make money buying a car, you will always lose money.

 

Oh so true.....At $7-$10 a bottle it really puts a hurt on the wallet. I paid about $45 for 5 quarts of oil.

 

in that regard yes that is true. i just meant that if you are going to spend all this money on a vehicle you better take care of it to make sure that money didn't go to waste. i can see it as an investment though, having a car lets you do so many things.

 

He didn't mean investment as in "sell it for big bucks in 5 years." He meant investment as in "holy s***, I spent $15 grand on this car, it better get me from point A to point B for a good number of years."

It's only comfort. Synthetic oil will not give you added performance. Please lose that dream.

I just don't agree with you. The car I currently drive has 110k on the motor. It doesn't drive 100% perfect and leaks oil. It could last 300k, it could pop tomorrow. I just bought it last year, so I wasn't able to take car of it for the first 91k miles. I therefore find it very hard to justify fancy-pants oil on a motor that might die no matter what I do.

Now, that's just the way I think of it. I don't expect everyone to agree. But I figured I'd say it, since it is a discussion.

 

Who has been raping you on the price of Royal Purple? I am paying a little over $5 for a quart.

 

hah i just bought some mobil 1 full sythetic oil 10w30 at costco its cheaper

 

WOW you paid about 9 bucks a QT?... that's sick.

 

Well, I personally saw a power increase from an oil an few years back. I am also certain there is something to be gained. I mean, if you put a really high viscoisty into your engine, it will lose some power just because there's more loss due to pumping and so forth. The higher revving the engine, the greater the loss. Whether the increase is 'real' or a ~5whp error on the dyno, the physics of it stands.

First of all, I think yours is a bit of a special case and I would agree that the situation does not really justify itself super special oils. Secondly I agree that there are companies out there charging outrageous permiums for their oils. However, I still believe there is a benefit to be had in terms of prolonging engine life. The science of it i'd rather not get into. Just think of it as increasing the chance of your engine getting to and beyond 300k.

Your choice isn't limited to super-cheap or super-expensive. There is a lot of value to be had in the middle of the spectrum IMO.

 

I do grant that it's possible for oil to help performance SLIGHTLY. But at the same time I hate hearing that because I know n00bs will go "OMG I n33d Royal Purpl3 cuz SRT-4 is teh FASTAR!" . . .

And I know it's a range of prices. But I know that I change my oil when I should, so the cheapest possible is the best for me. Hell, my oil is clean enough when it comes out that sometimes my Dad reuses it.

 

I've been running castrol full synthetic 10w40 in my car and haven't had any issues with it. Actually I notice that the motor runs alot more silent with full syn than the regular motor oil to the point that if I didnt have an SRI and an N1 catback I would not even know that the car was on (from experience because those mods went on after I changed to Full SYN). Im planning on switching to Royal Purple because in my opinion Royal Purple is the best cuz I've used it in the past on other motors.

 

i used royal purple on my dsm but didnt see much of a difference when i used to quaker state hell oil is oil