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Engine burning oil. What to do? #4686249
03/06/18 01:32 PM
03/06/18 01:32 PM
Joined: Mar 2018
Posts: 4
California
Jeff999 Offline OP
Jeff999  Offline OP
Joined: Mar 2018
Posts: 4
California
I have a 1997 Toyota Tercel with 280k original miles. I've been monitoring the number of miles that it burns one quart of 10W-30 conventional oil for a while. The manufacturer's recommended oil is 5W-30, but it burns 5W-30 way too fast. My results have been highly variable, but I still think the data is useful. The level in the oil pan was not the same for all measurements which may have contributed to the inconsistent results. Oil consumption may increase as the oil level in the pan decreases.

From 184k miles to 247k miles I got five results and they varied from 1200 to 2200 miles per quart burned. The measurement I got at 251k and 252k showed that it burned a quart in 900 miles for both results, so something happened to the engine at that point. I have done compression tests myself after 252k miles, and the compression readings were good. So I guess something happened with the valves at that point maybe with their seats. The compression tests were not entirely trustworthy because the compression gauge needle would never peak with both of the gauges I used, i.e., as long as I cranked the engine the needle would continue climbing for some strange reason. But somehow the readings for all the cylinders were very close and within spec, and after several minutes the needle did not drop so there was no leaking. Because of the increase in oil burning after 251k miles I started using Lucas Oil Stabilizer at 40% concentration. The LOS did reduce the oil burning. At 262k, 265k, and 280k miles I got 1669, 1968, and 1627 miles per quart of oil burned respectively.

Lucas Oil Stabilizer is not popular on this forum, so what should I do about the oil consumption? Should I continue using the 10W-30 untreated and burn a quart every 800-900 miles? 5W-40 oil is controversial for several reasons especially for engines designed to use 5W-30, so should I try 10W-40 untreated? I recently started using Castrol High Mileage 10W-30 which does not seem to have made much difference. I'm not willing to have any serious engine work done because I will have the engine replaced for under $1000 with a used one from Japan that has 30-40k miles on it or pay a little more to have the engine rebuilt before spending several hundred dollars for serious engine repairs.

Thanks for any replies.

Re: Engine burning oil. What to do? [Re: Jeff999] #4686254
03/06/18 01:36 PM
03/06/18 01:36 PM
Joined: Mar 2017
Posts: 5,377
Soviet State of Washington
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 5,377
Soviet State of Washington
Skip the Lucas. Next oil change go with Valvoline Maxlife which may help. It all depends on how your engine is burning the oil, whether via the valve seals or rings or other.


2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter

Re: Engine burning oil. What to do? [Re: Jeff999] #4686258
03/06/18 01:38 PM
03/06/18 01:38 PM
Joined: Jan 2010
Posts: 117
Olathe, KS
CARJ Offline
CARJ  Offline
Joined: Jan 2010
Posts: 117
Olathe, KS
If it was my car, I'd try some 15w40 Rotella next time.


2004 Toyota 4Runner | 178k | PYB 5w-30
2012 VW Passat | 82k | Castrol Professional 5w-40
Re: Engine burning oil. What to do? [Re: Jeff999] #4686264
03/06/18 01:42 PM
03/06/18 01:42 PM
Joined: Feb 2015
Posts: 2,194
Slovenia EU
Kamele0N Online sick
Kamele0N  Online Sick
Joined: Feb 2015
Posts: 2,194
Slovenia EU
Get one quart of whatever ester based oil (usually motocycle) and use that at next OCI...

Esters will recondition your (valve) seals and will also clean your gunk out of your engine...Maybe even loosen gunk around your oil rings

Last edited by Kamele0N; 03/06/18 01:43 PM.

2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD Shell Rimula R6M 10w40
Re: Engine burning oil. What to do? [Re: Jeff999] #4686265
03/06/18 01:43 PM
03/06/18 01:43 PM
Joined: Sep 2004
Posts: 21,626
Orlando, FL
Mr Nice Offline
Mr Nice  Offline
Joined: Sep 2004
Posts: 21,626
Orlando, FL
Not much you can do but continue to check oil level and top off.

Re: Engine burning oil. What to do? [Re: Jeff999] #4686266
03/06/18 01:44 PM
03/06/18 01:44 PM
Joined: Oct 2015
Posts: 2,651
Balearic Islands , Spain
FordCapriDriver Online content
FordCapriDriver  Online Content
Joined: Oct 2015
Posts: 2,651
Balearic Islands , Spain
Ditch the Lucas stuff.
Change the oil and filter and put some Valvoline Maxlife 10W-40 in it, it's well known for reducing consumption quite well.

You could try replacing the valve stem seals, they harden up overtime and no longer seal, i did that to one of my cars and it went from drinking 20W-50 to not burning a drop.
Replace the PCV Valve aswell.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.
Re: Engine burning oil. What to do? [Re: Jeff999] #4686277
03/06/18 01:51 PM
03/06/18 01:51 PM
Joined: Aug 2017
Posts: 166
South Texas
Insertcoolname Offline
Insertcoolname  Offline
Joined: Aug 2017
Posts: 166
South Texas
perhaps try a non resource conserving 10w30
Such as Mobil 1 high mileage 10w30?
It sits a little on the thicker side of the 30 range
And is a bit more robust with a HTHS rating of 3.5

Pennzoil platinum high mileage, quaker state hi mi, pennzoil hi mi,
valvoline maxlife, and maxlife full syn are all resource conserving now

$26 at walmart and a $12 REBATE going on right now....m1 hi mi comes out cheaper
Than maxlife syn blend.

Just a suggestion...

I also noticed my camry is designed to run on 5w30
In the USA but in other countries 20w50 oil on same engine
Is acceptable. I would give a xw40 a go.
Or that thick M1 himi 10w30


04 Camry 2az-fe 2.4L 204k QS HiMi 10w30
Supertech white can filter
Re: Engine burning oil. What to do? [Re: Jeff999] #4686288
03/06/18 02:02 PM
03/06/18 02:02 PM
Joined: Dec 2012
Posts: 604
Washington for now
WhyMe Offline
WhyMe  Offline
Joined: Dec 2012
Posts: 604
Washington for now
you might have a issue where changing oil will do nothing. if that the case keep driving till it dies. oil is cheap. my sub with 285k is the same. it runs great and still get good gas mileage, but it sucks oil.

Re: Engine burning oil. What to do? [Re: Jeff999] #4686296
03/06/18 02:05 PM
03/06/18 02:05 PM
Joined: Nov 2006
Posts: 19,898
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,898
MA, Mittelfranken.de
21 years old and almost 300K, either run a 15w40 or 20w50 or swap the engine if the car is worth it and you need/want to keep it.
Personally I cant see as the rest of the car has a lot of years and miles but to each their own. I would seek out a replacement car and let this one die in peace.

2cents


ASE L1, Master. Deutsch Meisterbrief.
Re: Engine burning oil. What to do? [Re: Jeff999] #4686301
03/06/18 02:16 PM
03/06/18 02:16 PM
Joined: Jul 2008
Posts: 1,090
British Columbia, Canada
ecotourist Offline
ecotourist  Offline
Joined: Jul 2008
Posts: 1,090
British Columbia, Canada
You could have failing valve stem seals. If so you should notice a bit of smoke on start up. They're fairly easy (and shouldn't be too expensive) to replace.

Or you could have a failed PCV valve. I'd suggest you replace it unless it's almost new.

Or your rings could be worn or carboned up. Nothing helps worn rings except replacement, but an "Italian tune up" and possibly some oils (as suggested by other writers) might get rid of some of the carbon. It's worth a try.

And a heavier weight xW-30 or xW-40 weight oil should help. I'd try Castrol 0W-30, a good heavy 30 weight oil (or Castrol 0W-40).

Finally, a quart of oil in 1000 miles isn't all that bad. If none of the above suggestions help, just keep an eye on the oil level and add oil as necessary.


2000 BMW 528i 5MT
2007 Honda Accord EX-L 4Door V6 6MT
Re: Engine burning oil. What to do? [Re: Jeff999] #4686313
03/06/18 02:35 PM
03/06/18 02:35 PM
Joined: Jun 2003
Posts: 17,342
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,342
Deplorable in apple valley, ca
My bosses Jeep was drinking 15w40. Last time I changed it I put sae40 in it. Have not had to add any oil since. Try a straight weight in it.


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: Engine burning oil. What to do? [Re: CARJ] #4686322
03/06/18 02:44 PM
03/06/18 02:44 PM
Joined: Dec 2011
Posts: 4,736
North Carolina
rooflessVW Online content
rooflessVW  Online Content
Joined: Dec 2011
Posts: 4,736
North Carolina
Originally Posted By: CARJ
If it was my car, I'd try some 15w40 Rotella next time.

Bingo Bango. Buy a 2.5 gallon jug and keep it topped up.


"Zed's dead baby, Zed's dead."
Re: Engine burning oil. What to do? [Re: Jeff999] #4686326
03/06/18 02:50 PM
03/06/18 02:50 PM
Joined: Nov 2008
Posts: 12,522
NH
supton Online content
supton  Online Content
Joined: Nov 2008
Posts: 12,522
NH
Good on you for your measurements, and willingness to try stuff out.

But if it was me, I'd just keep checking the oil and keep it topped off. Cheaper than a new car payment! Assuming it's not PCV or leaks; not sure how hard it is to change valve seals on this engine.

New cars are allowed to burn up to a quart every 1,500 miles so you might not do better even you did buy new.


2011 Toyota Camry, base, 2.5L/6MT, 163k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 144k, ours
1999 Toyota Camry LE, 2.2L/4AT, 187k, his
Re: Engine burning oil. What to do? [Re: Jeff999] #4686359
03/06/18 03:12 PM
03/06/18 03:12 PM
Joined: Jan 2008
Posts: 87
SE Florida
Powerglide Offline
Powerglide  Offline
Joined: Jan 2008
Posts: 87
SE Florida
So if the Lucas cut the motor's oil consumption in HALF, and it's has over 280,000 miles on it. Why would you stop using it? Seems like the product did exactly what it's supposed to do. Using Lucas in any newer car seems dubious. but f it keeps a 280k mile Toyota on the road and the guy behind you fog-free and conscious. Why not?

Re: Engine burning oil. What to do? [Re: Jeff999] #4686363
03/06/18 03:15 PM
03/06/18 03:15 PM
Joined: Oct 2009
Posts: 3,208
Wet side WA
JohnnyJohnson Offline
JohnnyJohnson  Offline
Joined: Oct 2009
Posts: 3,208
Wet side WA
Haven't you got your moneys worth out that old Tercel yet?


2004 Corolla 124686
Out: VML 5w-30 TG4967 OCI 5007 Miles
In: EDGE EP 5W-30 Bosch 3311 122537 7-18-18
2006 Duramax 74277
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 74705 4-22-18
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