I own a 96 accord v6 with 118k and its been eating about 2 quarts of oil every 3k miles. I drive the car mostly on the highway and do about 80 miles a day. Ive been doing normal oil changes and generally use synthetic oil but the last time used regular mineral oil.
The car is running perfect, that is i see no smoke of any kind during idle or acceleration and also there are no leaks that i can find anywhere.
So where the hell is my oil going?? The only explination i can think of is its getting burned but very slowly.
What could be wrong??
Thanks.

 

Closely check the PCV system for a blocked PCV or PCV hose. A blocked PCV or hose will cause blowby pressure to force oil vapor into the air intake duct through the PCV air intake on the inlet duct. If you see lots of black deposits and maybe oil on the duct downstream of the PCV intake, you have a PCV problem.

Other possibility is poor valve stem seals, however these will usually result in oil smoke at idle and on initial acceleration after idling in place for a time.

If oil is not leaking, the PCV problem, valve stem seals, or oil control rings are only options for oil to be consumed.

good luck

 

What about a headgasket problem? Check your coolant and if there are any oily spots in it, that might mean you have a serious problem.

 

your probably leaking it, switching from syn to conventional oil without blending will eat gaskets...check for leaks also check to see if your coolants got oil in it like he said... that the only way i see it eating 2quarts....thats kinda alot to go out the exhaust.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ArchAngel Sabastian &raquo;</TD></TR><TR><TD CLASS="quote">your probably leaking it, switching from syn to conventional oil without blending will eat gaskets...check for leaks also check to see if your coolants got oil in it like he said... that the only way i see it eating 2quarts....thats kinda alot to go out the exhaust.</TD></TR></TABLE>

I'm thinking of switching back to regular oil from synthetic, how do you mix them?

 

have you crawed under the car and looked for a leak? could be a crank seal

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dannyboi &raquo;</TD></TR><TR><TD CLASS="quote">

I'm thinking of switching back to regular oil from synthetic, how do you mix them?</TD></TR></TABLE>

well if youve already done a 100% switch to synthetic your kinda screwed but a switch from conventional oil to syn should be done in my opinion in 10 stages or 10 oil changes starting wiht 10%syn and 90% conventional, 20-80, 30,70 ect.. till your 100% syn some people use 25% increments.

 

Hey thanks for the info guys.
I really dont want anything to happen to my car i was thinking to take it to a good mechnic i know, but wanted to see what i could do before.
Ill try what you guys said
Thanks.