Info needed: 1967 M38A1 Lubrication?

[Les Kovacs]

Thanks Rob....I guess I will be buying more 2243's....the plugs were not fouled (all three 2243 & the single 2245 I took out) in fact they were all nice light tan on the insulator suggesting a clean burn....which leads me to my next question....then where is my oil going?.....I am loosing about 1/2 a quart of 15W40 in approx. 200-300kms. There is no visible oil in the coolant (which has remained new looking and bright green), the exhaust does not blow blue smoke on start-up (valve seals) nor smokes on the drive....I leak 1-2 drops per day from the area around the rear main seal and that's it. Where is the oil going?

Regards,

les