122k here, mobil1 10w30. Up to previously it was leaking (it was leaving puddles underneath) and burning a bit of oil. I just replaced ALL the gaskets and also did the valve stem seals, so the consumption should go down a bit now. I'll find out this week.
94 T'Bird (280K miles) = 1.0 qt per 1K miles (Valvoline MaxLive 20W50 i.e. molasses. :leftright )
95 Cougar (180K miles) = 1.5 qt per 1K miles (Valvoline MaxLife 10W30)
97 Mark VIII (125K miles) = 1 qt per 1500 miles (Castrol GTX 10W30)
While a qt per 900 might be okay to Ford, it isn't for me. I had to add a qt to my 2000 Grand Marquis. I didn't feel as bad as I thought I would, since it is mile 8500 on the extended drain M1 15,000.
I usually use a pint between changes (at 5,000+-) and this time that is about what I used, I think the 12 hour/1022 mile trip in one day is the reason it is the other pint down. I don't know if I can go to 15k, but I am going to try to leave it in there (and change the filter) for 10 to 11k.
On the same subject, has anyone used Lucas oil products to slow oil consumption?
I drive a truck and put a gallon of Lucas in every oil change and it works wonders. (every 15K and the truck holds 11 gallons of oil) Opinions are welcome.
140,000miles and 95 4.6L. Consumes 1L per 1000kms.
Passed emissions test. No smoke during WOT. Worst after extended idling in drive, like long line up at the drive through - smoke city.
Ford, Volkswagon, Dodge, they all say that consumption is normal but that's BS. It's only to cover their *** for warranty claims.
My wife's 94 LHS 3.5L. If you pull the stick just before it's 5000km oil change interval it's only down 1/4 to 1/2 a L or quart.
The lucas's stuff is not necessarily the best option for your engine. All it does is thicken the standing viscosity of your oil, its a straight weight. You'd see more benefit and less cost by bumping your viscosity range up (10W30 to 10W40, 10W40 to 15W40 (Less VI's and more additives), and eventually...15W40 to 20W50 which at this point you need rebuilt.
Lucas's also foams. Badly. The small gear tests in auto parts stores confirm this as well as tests. You can easily turn lucas's into a frothy mess in those things. Just think about when its inside distro gear, oil pump, or as the crankshaft swings round and round.
You can add lucas's if you want, but you'd get its benefit and then some by just increasing to a heavier viscosity of oil.
10W40 I don't tend to like because it has such a wide range to cover, it tends to "burn" to a thicker starting weight faster then other weights.
Sorry to write a book. Just passing on the knowledge.
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