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  1. M

    Oil Recs for 1986 Jeep CJ7

    This has the 4.2 6 cyl 258. Manual says 10/30 or 10/40. Use will be around town, some highway. Any preference on the weight of oil? Engine has 69K on it.
  2. M

    2006 6.0L concern area? Blackstone

    Is a 7 for Aluminum a real concern? That number was at 23K. The previous numbers were 4 at 17.5K, and 4 at 12.2K. Universal average is 3. I have used 15/40 Delo400 after the initial Motorcraft oil. Thanks, Pat
  3. M

    Supertech full synthetic 75/140 from Walmart

    Is this a good quality synthetic to go into my Ford Sterling 10.5? Thanks, Pat
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