I know the subject has been rehashed in this forum more than once, but I
just found interesting note on the web
(http://www.automotivehelper.com/topic130758.htm ) stating oil usage is due
to insufficient drainage in oil control rings. My Trooper 98 (3.5L V6, 110K
miles) is consuming 1qt every 300-400miles, and I've tried all sorts of oil
additives with no effect whatsoever. I'm wondering if these oil control
rings can be changed to eliminate the problem? If so, where would I look for
new ones and how much work is involved? Any ideas?
I'm switching to half-synth 10w-40 as full synth at my mileage seems like
total waste of money. Will report how it behaves.
My trusted mechanic proposed another take on this: spark plugs seem to be
clean (so probably is not burning it off), but oil filler cap lacks rubber
seal. It could be that oil is slowly being forced out thru filler cap, and
since it happens only when driving there's no visible leakage under the car.
Sorry for the empty replay before.
try hiring/borrowing a low pressure steam cleaner/waterblaster and
throuroghly cleaing the engine bay, and after topping up the oil wipe down
any new spills, see if a lot of gunk builds up again.
I have been using a full synthetic, with a "1" in it's name, for over 3000
miles in my 98 Trooper. I have used 0W-20 as has been suggested in this
group, and in other forums, as the cure for this oil control ring problem.
My experience so far: a waste of money. The synthetic has made NO
difference whatsoever in my Trooper's thirst for oil. It still has required
an additional quart every 1000 miles or so, just as it did on regular dino
oil. I have been adding more M^&*%-1 when it got low, but my patience with
this "cure" is wearing thin and I suspect the next quart is gonna be back to
I have since totaled our 98 Trooper (98,000 miles), but it was using a
quart every 1,500 miles or so. I used Mobil 1 10W30 since about
10,000 miles (we bought it new).
The last few oil changes, I found that by mixing 50/50 of Mobil 1 5W30
and Mobil 1 15W40, reduced consumption considerably. Consumption
dropped to about 1/2 quart in 2,000 miles, which I consider much
better. When it would use some, I would refill with 15W40.
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