I don't plan to keep this car long but I'm going to take a shot at significantly improving the oil consumption. 158k miles on it, my mom was the original owner and I've just recently bought it for my daughter to drive until she goes to college.
I did most of the maintenance on the car over its life - slightly neglected at times in terms of letting oil change intervals get to 10k but nothing horrific. Synthetic probably used 2/3 of the time and with whatever oil filter came in an oil change deal. Maybe it was run a bit too low at times after the consumption became an issue- which probably happened a bit after 100k miles. I'm guessing it burns a quart every 700 miles at this point; I'd say that rate has been fairly steady since it started burning. No real mechanical failures on the car; other maintenance has been limited brakes, tires and maybe one trans pan dump change. (I'm changing both trans filters and plan to do about 3 pan dumps.)
I've put in a new PCV and did a pint of MMO in the oil with no discernible effect. I bought a quart of Kreen and have a tentative plan. I'd like any suggestions on amendments but it must include Kreen in plan; I will consider additional products in the plan.
I also have on the way two sets of Autolite 3923/cheap cooper plugs, 2 new NTK upstream oxygen sensors and a few extra oil filters. I will be picking up the oil needed as referenced in the plan.
Plan:
1) Piston soak. Pull plugs and pour about 2oz Kreen in each cylinder through a brake bleed hose. Rotate motor by hand a few revolutions and let sit for about 48 hours. Any need to thread the plugs back in to close off the soak area?
2) Start it up, watch the smoke show for a bit, drive a few miles and bring back warm for oil change.
3) Put in 10w30 Rotella and new filter with a pint of Kreen. (is that too much?)
4) At 500 miles of this oil fill, change oil filter
5) Another 500 miles and put in a high mileage oil/new filter (not decided on 5w30 or 10w30), new plugs, new oxygen sensors
Thanks for any constructive suggestions.
I did most of the maintenance on the car over its life - slightly neglected at times in terms of letting oil change intervals get to 10k but nothing horrific. Synthetic probably used 2/3 of the time and with whatever oil filter came in an oil change deal. Maybe it was run a bit too low at times after the consumption became an issue- which probably happened a bit after 100k miles. I'm guessing it burns a quart every 700 miles at this point; I'd say that rate has been fairly steady since it started burning. No real mechanical failures on the car; other maintenance has been limited brakes, tires and maybe one trans pan dump change. (I'm changing both trans filters and plan to do about 3 pan dumps.)
I've put in a new PCV and did a pint of MMO in the oil with no discernible effect. I bought a quart of Kreen and have a tentative plan. I'd like any suggestions on amendments but it must include Kreen in plan; I will consider additional products in the plan.
I also have on the way two sets of Autolite 3923/cheap cooper plugs, 2 new NTK upstream oxygen sensors and a few extra oil filters. I will be picking up the oil needed as referenced in the plan.
Plan:
1) Piston soak. Pull plugs and pour about 2oz Kreen in each cylinder through a brake bleed hose. Rotate motor by hand a few revolutions and let sit for about 48 hours. Any need to thread the plugs back in to close off the soak area?
2) Start it up, watch the smoke show for a bit, drive a few miles and bring back warm for oil change.
3) Put in 10w30 Rotella and new filter with a pint of Kreen. (is that too much?)
4) At 500 miles of this oil fill, change oil filter
5) Another 500 miles and put in a high mileage oil/new filter (not decided on 5w30 or 10w30), new plugs, new oxygen sensors
Thanks for any constructive suggestions.