Supercharged Now Using Oil

[tacojeff]

So I installed a supercharger over the winter on my 99 with 122k on it. Have since driven about 3000 miles on it, no engine codes and everything seems good from a performance standard. Changed the PCV valve, and valve cover gaskets when I installed it.

I've never had to add any oil between oil changes but I recently checked the engine oil and it was about a half quart low. I attributed it to short filling it when I changed it 2000 miles before. I filled it up, drove 500 miles, and dumped another half court it to top it off yet again, and this cycle has gone on 4 more times now.

I'm headed out on a 3000 mile mountain road trip leaving tomorrow and have myself convinced that the engine is self destructing with the SC. Not likely but the consumption seems odd. I don't see any significant oil in the intake which leads me away from crankcase pressure issues.

Anyone have any ideas of what could be wrong?

 

[shootmymime]

So I installed a supercharger over the winter on my 99 with 122k on it. Have since driven about 3000 miles on it, no engine codes and everything seems good from a performance standard. Changed the PCV valve, and valve cover gaskets when I installed it.

I've never had to add any oil between oil changes but I recently checked the engine oil and it was about a half quart low. I attributed it to short filling it when I changed it 2000 miles before. I filled it up, drove 500 miles, and dumped another half court it to top it off yet again, and this cycle has gone on 4 more times now.

I'm headed out on a 3000 mile mountain road trip leaving tomorrow and have myself convinced that the engine is self destructing with the SC. Not likely but the consumption seems odd. I don't see any significant oil in the intake which leads me away from crankcase pressure issues.

Anyone have any ideas of what could be wrong?

blow by, your piston rings are not sealing properly this causing pressure in the inside of the motor. the oil is then being pushed through the pcv valve and back through the combustion. thus oil burning.

 

[T4R2014]

Was it an OEM PCV valve? My friend's Corolla burnt oil like a mofo after he put in an auto store PCV valve. I'm pretty sure it was the same part number for 4Runners too.

 

[tacojeff]

Seems like a possibility on the PCV valve. It was the higher end Napa one, that doesn't scream quality. I'll try swapping it out with a Toyota one.

I don't believe it's just blow by causing this. It wouldn't just show up post super charger when it never burnt any before.

 

[shootmymime]

Do you guys not know what catch cans are? Yes installing a super charger could cause oil usage.

The Corolla oil usage probles are not the same. Ask me. I am going to Vegas to pick up a motor for my Corolla then sell that thing for as much as I can and never look back.

 

[T4R2014]

Do you guys not know what catch cans are? Yes installing a super charger could cause oil usage.

The Corolla oil usage probles are not the same. Ask me. I am going to Vegas to pick up a motor for my Corolla then sell that thing for as much as I can and never look back.

Very much aware of what they are. And yeah, the 1ZZs in those Corollas are serious piles. When we put the OEM valve the consumption was considerably reduced, though. The NAPA valve could be his problem. It is a cheap place to start in OP's situation.

 

[Konkordmusk]

blow by, your piston rings are not sealing properly this causing pressure in the inside of the motor. the oil is then being pushed through the pcv valve and back through the combustion. thus oil burning.

It's not blow by, if there was an ineffective seal it would actually cause less pressure. Leftover oil from lubricating the cylinder walls, and then being part of the combustion, is blow by. Either that or when the combustion process actually pushes fuel and air into the crankcase.

What I personally think is happening here is what's called oil pull over. I think so because you changed the pcv valve with lower quality version. This low quality valve is limiting the return of oil from the heads, so its either leaking out somewhere or being burnt slowly internally. Change the PCV valve! Maybe even back to the old one, unless it was completely failed.

 

[tacojeff]

Changed the PCV with to a new Toyota one. This is a work of art, it's actually mostly metal construction for only $15! It's in and has 1500 miles on it already. Haven't checked the oil down in Colorado yet, but halfway it hadn't seemed to loose much if any yet