On my 2nd OCI of Castrol GTX 10w30 HM. 1993 S10 2.8L just shy of 203,000. Truck has had a slow rear main seal leak for a while. Can't really tell it has slowed the dripping down much at all compared to non HM oil. I just changed out the valve cover gaskets two weeks ago. Trying to avoid RMS. Will leave a drip or two overnight if driven. I was thinking of giving Maxlife or Pennzoil HM a try if GTX HM didn't slow down/stop the dripping. Not sure how long I should stay the course. Truck isn't driven a lot so we are looking at two-three OCI a year. I used to run Pennzoil/Quaker State in it 90k-160k before I sold it off to a guy. I just bought the truck back and the old farmer told me he was running Rotella in it up 198k. I switched it over to Castrol GTX HM at 200k to see if it helped clean/condition seals. It worked well for my 04 Focus Zetec that had some consumption issues but no leaks. Long time lurker on here.
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