My '99 is burning oil... - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to   Members

Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

LinkBack Thread Tools Search this Thread
Old 10-09-2010, 05:37 PM   #1
Elite Member
Thread Starter
iTrader: (2)
Join Date: Jun 2009
Location: Istanbul, Turkey
Posts: 2,050
Total Cats: 433
Default My '99 is burning oil...

Yes, it's official.

It is consuming about a quart in just over 500 miles.

I also get a puff of smoke out the tailpipe when I get on the gas aggressively once the engine is warm.

Compression test was 180 psi on all four.

The engine has 164.000 Km on it.

Do you think its ring related as I think it is indeed the culprit?


What do you guys think I should do?

I can do a basic hone, with new rings, bearings and a head gasket. That would be the most economical way to go. (I would change the stem seals, as well, while I get in there, of course.)

I really do not want to (and can't) go the whole way with a full bore, new pistons, etc..

Any thoughts, ideas?

Godless Commie is offline   Reply With Quote
Old 10-09-2010, 05:58 PM   #2
Elite Member
Join Date: Mar 2010
Location: Detroit
Posts: 1,524
Total Cats: 27

I had the same issue with my 99. Went ahead and did a ring and hone job and had the head cleaned up along with new seals before I ordered my turbo kit.

In all honesty it didn't do a damn thing. I used to go through a quart every 200 miles with 190psi across the board, now I go through a quart every 350 with 205psi across the board. I wanted to have new guides put in while the head was off but the machine shop said they all looked great and it wasn't needed. I also don't see a lot of blue smoke either and I don't have a cat.

I'm noticing a lot of 99's having the same problem.

My engine runs great and I've been boosted for about 3 months without any issues except the comsumption. Mine isn't a daily driver so it isn't that big of an issue for me to add a quart every few weeks or so. When I do take her out, I drive the **** out of it though with lots of high revs. I may see better consumption #'s taking it easy.

I also replaced the pcv system and searched for any leaks but so far I can't find ****.

When I pull the drivetrain out for a new clutch in the winter I may end up swapping motors. I have 117k on this one with about 4k on the rebuild.
flounder is offline   Reply With Quote
Old 10-09-2010, 06:21 PM   #3
iTrader: (76)
18psi's Avatar
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587

You need to figure out exactly why the car is eating oil, and not just assume that its the oil rings without having any real proof.

I'm noticing a lot of 99's having the same problem
I have NEVER heard this before, and do not believe it for a second. My car and many 99-00's owners I spoke with don't have oil consumption issues at all.

My stock motor didn't eat oil for about a year, and only about a month or two before it blew did it start eating oil, and only a LITTLE bit. Like a 5th of a quart between oil changes. Since the build it hasn't consumed a drop of oil.

All I'm saying is do a whole lot more investigating and hopefully find out 100% the problem before doing anything drastic.

I'd also recommend throwing in h-beam rods in there while you're in there. It just makes sense. rods+cleaned up stock pistons+chromoly rings+new gaskets= nice mild build that should definitely run like a champ for a while.
18psi is offline   Reply With Quote
Old 10-09-2010, 07:21 PM   #4
Elite Member
Join Date: Mar 2010
Location: Detroit
Posts: 1,524
Total Cats: 27

Search on, cr, mt and you'll find a few 99's with this issue. I have a very early edition of the NB #7477- 2/98. I'm not sure if that has anything to do with it or not? No issues with the #4 thrust bearing either.

I'm not saying it should be a recall or anything but it is happening. I'm hoping to find the rear main leaking when pull the trans, but I'd imagine with that much consumption the clutch would have been slipping like crazy by now.
flounder is offline   Reply With Quote
Old 10-09-2010, 10:47 PM   #5
Junior Member
Join Date: Nov 2009
Posts: 82
Total Cats: 0

My 99/00 had 190,000 on it when I put the 05 engine it and it never used a drop. The last 2000 miles it was used for nothing but an autocross car.
engled is offline   Reply With Quote
Old 10-10-2010, 12:20 AM   #6
Elite Member
Join Date: Mar 2010
Location: Detroit
Posts: 1,524
Total Cats: 27

wanna trade?
flounder is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
What happened to my Dynalite? midpack Suspension, Brakes, Drivetrain 18 09-22-2015 08:52 PM
Help multi issues here! ReallyRottenTurbo MEGAsquirt 4 09-22-2015 01:49 PM
mslabs MS2 - Idle control issue ndragun MEGAsquirt 0 09-20-2015 11:28 PM
Missfires on idle and cruising (no load) emarkey DIY Turbo Discussion 2 09-05-2015 07:59 PM
ME221 Now has Autotune and Long Term Fuel Trim Tables Motorsport-Electronics ECUs and Tuning 0 09-05-2015 09:02 AM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -4. The time now is 07:16 AM.