Quote:
Originally Posted by Nostril Cheese
If this is a M42 4 cylinder, it does indeed have hydraulic lifters and they do stick over time. I'd consider running a little BG EPR or Seafoam in the oil just prior to an oil change. I'd run a heavier weight oil too.
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It's funny but after I typed that, I had a thought that maybe the last 318 twin cam motors had hyd tappets? Wasn't sure though, thanks for clarifying.
As for oil, unless those motors have different requirements than the earlier engines, I would run 20w50 dino oil, (not synthetic), in a hot climate. The oil you are running has the consistency of water.