Once you run synthetic i don't think its good to go back to regular. Royal Purple seems to be the best choice.

 

hmmmm. air filter may be dirty and needs changing/cleaning, injectors may be clogged, tire pressure may be badly off, in need of an oil change, or could be a combo of all these things. Go get a good tune up then see if it changes anything.

 

Who decided Royal Purple is the best? Maybe if we were driving a G35. It really is moronic to put $9-10 per quart oil in a car that was $18,000 new and is now worth about $5,000 after a couple years.

You can switch oil back and forth. Doesn't matter. If it did matter there would be no semi-synthetic oil since its a mixture.

 

I said it seems to be the best choice. i didn't say it was nationally voted upon. you really need to calm down. Maybe some people like to take care of their car.

 

And the car is worth more than 5,00 dollars.

 

the ralliart is worth more. My 04 lancer with 40000 miles in perfect condition is only rated $9000. Royal purple and all that high priced oil is really only needed if you have a performance engine or one that needs better lubricant, temperature and such. Like a bike or evo, or turboed. other than that, it helps but isnt manditory, so if you want to use your money on it, its your decision. You do get better mileage and power out of it though.
I am 6'3" and weigh 130 lbs, i get 27-29 mpg even when I drive hard lol.

 

Try to sell it then. Maybe you will come to grips with the fact that its basically worthless to anyone else but yourself.

 

This is the farce that this thread is debunking. I have the worlds cheapest oil in there now and picked up 2 mpg.

 

I don't want to sell it. Why don't you sell your OZ? Thank you drucea.

 

33mpg and its been paid for for 2.5 years. Cheap transportation.

 

There you go. You have a reason for liking your vehicle as i have a reason for liking mine even if the value went down a few thousand dollars.

 

I dont know why you picked up the extra mileage, how long has the mileage been good like that. As you drive, your gas mileage will go down a bit, then after changing your oil, it picks up a few miles, no matter what oil you put in it. There are just bigger gains for better oil. if you had used, say, royal purple, you might have picked up maybe 4 more mpg. Who knows. The good stuff is expensive because it has been proven with dynos and mileage.

 

31mpg for a good 2 years. I only drive it May til October, I don't know what it gets in the winter. Car only has 36k on it.

 

Damn, thats not alot of miles at all for an '02. My car has about that many yours is 2 years older.

 

big woop, and watch your engine internals rot