After how much milleage you replace the oil???

I'm asking the question because i bought the car at 10 000 km and i did the first oil change at the dealer at 12500 km and put repsoil synthetic oil and the dealer recommand to change the oil every 6 000 km even if i out synthetic oil. I'm now at 18 800 km and the car is due for the oil change. Next week i'm giong on vacation and will do around 1500-2000 km during the trip. I am use to put sythetic oil in all of my cars and replace the oil at every 8 or 10 k. I own a 08 Mazda 5 and mazda recommand to replace the oil at every 8 000 km and i do it at every 10 000km. So, the oil level is good and the oil is clean, i think i will do the oil changes at every 8 000 km instead of 6 000 since i'm putting synthetic oil and i will put castrol synthec from cosco like i do with my mazda 5. It cost 42.00$ instead of 80 $ at the stealer. What do you think, am i wrong to do the oil change at 8000km instead of 6000km?

 

I live in the desert southwest of the US where summers are very hot so I follow Mitsubishi's severe maintenance schedule and change the oil and filter at least every 3750 miles which works out to every 6000km for those of you on the metric system. The "normal" maintenance schedule for US vehicles recommends changing oil every 7500 miles or 12,000km.

How often you should change your oil would depend upon climate conditions where you live, and driving patterns. For example a lot of stop and go city driving, vs a lot of highway miles. The important thing is to follow Mitsubishi's (not the dealers) recommendation to keep your warranty in effect. If you are uncertain, perhaps you should call Mitsubishi to see what they recommend.

 

I agree with azjake. I live in a climate that changes quickly. Goes from hot to cold in a hurry. And weather, particulary temperature, can break down your oil just as much as use does. I go by Mitsu's "severe maintenance" schedule of 3,750 miles. I've done it as early as 3,000 and as late as 5,000.

Colorado can change from 70 deg to 30 deg over night, or from 50 at night to 100 deg during the day. Plus the summer is very dry (usually) so lots of dust, with no humidity.

 

i live in Quebec, so the engines are nder severe conditions but at both extreme. can be over 30 c in the summer and minus 40 in the winter. i don't want to save money but if the oil is still good after the recommended 6000km(with mineral oil), why not wait another 2000km?

 

Like Colorado, Phoenix is very dry and dusty especially in the summer, so along with the oil changes you need to keep a close eye on the air filter and change it at a minimum every year or 12,000 miles.

 

Here in México, 12,000 km or 1 year, what it happens first.

 

For oil change???? wow, thats too long.

 

As long your Oil is not very BLACK you can get another a thousand mile before an oil change as long it is not DARK.

if it's dark have an oil change.

I just had an oil change on my 2008 Lancer with 54,500 miles. The dealer wrote on the sticker on the windshield 52,700 I changed my oil at 54,000.

Anyway it's a Japanese car it will still run as long it as oil in it.

If you want to spend money and changed oil every 3,000 miles it is up to you it is your money.

 

Yeah, the oil is 'clean'. In case that I it will find the oil dirty, immediately it would change it, but stays it in good conditions by that time interval

 

guys...please go to this forum...all they talk about are oils:
http://www.bobistheoilguy.com/
With the correct oils, a 1yr/12k miles is not unheard of...but you have to buy something like Royal Purple or something like that...good oils.

I use a 5w-20 synthetic blend and change every 5k miles. I live in upper Missouri in the United States. I run similar oil in my Ford Ranger and at the same change intervals...I'll be sending in for a used oil analysis at 5k miles. If you are really interested, they cost 30 bucks here:
http://www.blackstone-labs.com/