Oil leak after 120 miles with a synthetic blend,
Hi all,
I put a synthetic blend (Castrol Truck 15w40, CH-4) in my 83 300D (183k miles) to help it turn on those cold days, it has now became my daily driver and to my surprise today I found some engine oil under it. Looks like it is dripping off of the torque converter (rear main seal?). What do you think I should do, drain it and put some cheap crap back in there or just live with it and hope it softens the seal back up enough to stop the leak?
Applicable info:
Around 2,300 miles the car's front main seal leaked.
I have receipts showing Castrol GTX 15w40 about every 4k miles. (I was assured by the previous owner that is doesn't burn any oil (liar).)
This is my first 120 miles driving this car, it has had the oil in it for a couple months now.
It didn't leak before this oil change.
The only reason I care that it leaks is that there is good chances I'll be selling this car soon and would like to say it doesn't leak.... I'm still contemplating trying some Rotella synthetic in the 84 just because the motor in it doesn't burn, just leaks.
Just out of curiosity, how much work is required in changing the rear main seal? Would it be a motor rebuild or just a nice weekend project?
Thanks.
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