Weird Oil Consumption (2008 Mazda3 2.3L)

:
2010 Mazda 5 Sport
An odd thing has happened 3 times to 2 different cars. One is a 2008 Mazda 3 hatch with the 2.3L. The other a 2010 Mazda 5 with the 2.3L. Both have like 120k miles give or take.

For the Mazda 3 it happened on 2 long trips. The car started with a fresh oil change. It had been driven a few times around before the trip and the oil checked at the start of the trip. After 5 hours or so, the oil barely registered on the dip stick. Put in 2 quarts both times and it stayed full for months until the next oil change.

Mazda 5... Car came back to me after a 14 hour trip... and I checked it and no oil on the dip stick. 2 quarts or so later and I have never had an issue since. Oil level has stayed full for months.

Otherwise, the cars run great. The Mazda 3 does have a P2177 which "luckily" popped on during the last trip, which made us check the oil. I think that code is for a dirty MAF which I will clean.

Weird that these things will burn 2 quarts up like that's in a few hours... then be fine.
 
Looks like that P2177 code may actually be the PVC valve hose which is a PITA to get to. The Intake manifold has to come out. The PVC may also cause some oil consumption but reports says it doesn't do much to fix extreme cases.

It seems these engines are prone to some serious oil burning at times but in this case, it's just weird how it's very quick to burn off 2 quarts and then nothing for the longest time.
 

New Posts

Back