Mazda6 V6 - burns 1qt of oil every 7k miles

[Elite130]

I have a 2007 Mazda6 S V6 with 45,123 miles on it. I had the oil light come on this week. Nothing seemed wrong, but I still brought it home and parked it. It was time for an oil change anyways, so I changed the oil last night. I found I was 1qt of oil low, would this have caused the oil light to come one?

Also, I found the V6 burns 1qt of oil every 7,000 miles. Is this normal? I have had my suspicions in the past, but I finally measured it out. I currently run Mobile1 5w-20. Would changing to a different oil help prevent this?

Any input to the oil light and the burning oil would be greatly appreciated.

 

[Guest20182]

I have noticed the same thing. I am at about 36k also running the fully synthetic Mobil1 5w-20 and am thinking about switching oils. I though the theory of synthetic was that it didn't burn off and break down like conventional, but another thing to think about is also your filter. I run the high capacity Mobil1 filter and it is usually really really full, so you have to think about that too. It might not be as low as your think. I am told that it has something to do with the PCV on this car however. After thinking about it though, 7k miles is a long time in between oil changes so 1qt over that span isn't bad. My oil light has never come on, is it possible that this car has a "reminder" light that needs to be reset?

 

[Elite130]

I am running the Ford Motorsport oil fileter. After tons of research, the Ford filter is a great filter, not to mention you can pick one up for $3 at WalMart. I'm wondering if the Ford filter can't go 7k miles between oil changes. I'm thinking I'm goingn to back down to oil changes every 5k, or pony up the $10 for the K&N filters. I haven't read about an oil change indicator light though.

 

[nate0123]

You might check the PCV valve. Those have been known to fail on the earlier V6s (not sure if 2007 was affected or not) and cause loss of oil.