Recommendations when Oil Consumption Increases ?

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Just curious if there is any advice on what to do if oil consumption increases for your engine. The consumption level I'm referring to is well within limits but it has increased. My engine wouldn't use more the 1/4 quart in 3000 mile oil changes, but recently it's gone up to a full quart.

I've been using Mobil 1 10w30 for the majority of engine life = about 46,000 kms. Up to a couple months ago it never used much oil using Mobil 1.

Three oil intervals ago I tried Castrol Syntec 5w-40 and it seemed to darken really quick so I dumped it kind of early as it looked dirty. Two oil intervals ago I went back and was using Mobil 1 again, and it was consumed at a higher rate. This last oil interval was run on Redline 10w30 and it was consumed at the same rate. It all seemed to happen after running the Castrol Syntec, maybe a coincidence, not sure.

I'm due for an oil change this week, was thinking of trying Castrol 0w30 GC as it is a tad thicker viscosity. Should I try a thicker viscosity again such as GC or even a 40 weight , will that help with oil consumption ?. I'm also wondering if perhaps my rings got varnished up somehow, it is a turbo 4 cyl. engine and it does get a lot of heat in it under boost.

I'm probably worrying about very little since 1 quart per 3,000 miles is still within spec. I think I am also being spoiled with my minivan, as I just took a 4,000 mile trip on Mobil 1 10w30 and it didn't burn a drop the entire trip. So it makes my other car seem like a guzzler.

but any advice would help. thanks
 
According to some, it is very normal to experience a short run spike in oil consumption when switching from brand to brand. Happend to me several times. Stick with one brand for awhile. (Hard to do I know) You might also want to try a cycle of Auto-Rx, then go back to Mobil 1.
 
Driving style makes a big difference as well.

When I run my engine continuously under minimal highway load/RPM's, high vacuum, for 10+ hours at a time, the oil consumption increases significantly.

When I drive like a maniac (not very often, due to high petrol $$$), or in the city, I consume no oil.

I figure when I operate under high vacuum, more of the oil gets sucked through the PCV system and burned. Also due to lower cylinder pressures, the rings don't seal quite as well, leading to more consumption.
 
quote:

Originally posted by BlazerLT:

quote:

Originally posted by Islandvic:
Install new PCV valve.

Quick fix for $4 USD.


Yip, good advice.

PCV valve has to be changed every year.


Good idea to change..but every year is pretty extreme (IMHO) if it ratttles when you remove it..its O.K. (generally)
 
my engine runs under high vacuum quite a bit, and I often decelerate from high rpms in lower gears rather than change gears, which creates really high vacuum. Our engine does consume oil through the pcv system , enough to drip out of the intercooler piping, it is a common issue. So a lot of oil does make it back into the intake manifold.

thanks for all of the suggestions. I really should stick with one oil, likely to happen after my next run of GC. I'll double check the pcv valve too, cheap insurance.
 
The last PCV valve I replaced would rattle, but I couldn't feel even a trace of suction through it, not to mention the telltale oil in the airbox. After replacing it, no more oil where it shouldn't have been and suction where it should have been.

Another benefit is that the leak(s) subsided a bit.
 
rattle test does no work.

I replaced my friend's PCV valve that was caked with oil sludge and it still rattled.

Spend the $4USD and get a new one.
 
quote:

Originally posted by Al:

quote:

Originally posted by BlazerLT:

quote:

Originally posted by Islandvic:
Install new PCV valve.

Quick fix for $4 USD.


Yip, good advice.

PCV valve has to be changed every year.


Good idea to change..but every year is pretty extreme (IMHO) if it ratttles when you remove it..its O.K. (generally)


The rattle rule is not what I would use.

Mine would rattle but when it heated up when driving it would stick.

It's a $3 part, are you going to be that cheap that you only do it every 5 years or something?
dunno.gif
 
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