87 supra using oil.

[Bill UK]

Check under the distributor for any oil on the exhaust manifold heat shield, a very common problem is the distributor O-ring needs replacing. Probably won’t account for the oil usage but defiantly will produce a strong oily smell under the hood. Unusual for the head gasket to leak around the oil path, they are some distance away from the combustion chamber and coolant gallery’s, I doubt if it’s the head gasket. If there is no evidence of a leak then you could assume its burning oil due to piston rings or valve oil seals, not uncommon on a high mileage engine, just check the oil frequently. Oh! and I agree with Krem synthetic oil is not recommended in the UK, most owners use semi- synthetic.

[Rob1]

well i am only running synthetic blend not full synthetic

[Rob1]

would you recomend just running conventional?? and the

[Bill UK]

I used Duckhams for many years in my first Supra in 1986.5 managed to do over 250,000 miles with no engine repairs apart from the odd BHG and a few puffs of smoke on de-acceleration now and again (you would expect a little burnt oil with 250 K) I've had two Supras since then, the current one being a 90 Turbo. Duckhams although still available over the Internet and a few small auotoshops isn't an oil that you hear mention now days. Come to think of it; I'm not sure why I changed to Castrol Magnatec 15- 40 part synthetic I think the lack of availability and probably the recommendation by other supra owners to use part synthetic.

[Rob1]

yeah im running the 10w30 synthetic blend part synyhetic you think i could be burning it up slowly cuz its to thin oil??

[Krem]

Originally Posted by Rob1

yeah im running the 10w30 synthetic blend part synyhetic you think i could be burning it up slowly cuz its to thin oil??

could always add some more oil and see if it holds better this time... be it no loss or at least slower rate of loss.. if there is noticable diff, I'd repeat the process till all your seals, rings and gaskets are working with the blend.. If it's the same rate of loss, or worse, you probably have a more significant problem.

Dunno how much weight this carries, but I've heard of oil getting past the valve plugs in the head covers.. have you checked the tops of your spark plugs (between the cams) to see if you've got oil building up in there? Tho I'd imagine you'd be aware of it by now if you did...

[Rob1]

i breifly looked at the first couple cylinders for oil between the cams on top of spark plugs but cant see under intake manifold and have not looked at rear of engine. ill add some oil and see what happens, thanks.