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  1. R

    Interesting potential twist in Mobil 1 saga

    As I commented earlier I changed the oil in both of my vehicles today and ran with the Castrol Edge 5w30. 1. The V10 is very very quiet now. It's never been that quiet on a fresh change of 5w20. Hopefully my oil consumption will go way down. I bottled a little used oil to send out for a UOA...
  2. R

    Using a thicker oil than is called for

    With 54,400 miles on my '06 Ford 6.8L V10, I just switched from either Mobil1 5w20 or Motorcraft SemiSyn 5W20 to Castrol Edge 5w30. The engine is noticably quieter. I only put the Castrol in because I couldn't find Mobil1 at either Walmart or PEP Boys and I wanted the oil changed this weekend...
  3. R

    Interesting potential twist in Mobil 1 saga

    Hi, First time post to the site, though I've been coming here to get info for years. On Monday, Wednesday and Saturday I went to 2 different Walmarts and our local PEP Boys for 7qts of Mobil1 5w20 for my '06 F250XLT w/ 6.8L V10 and 5qts of Mobil1 5w30 for my '96 Buick Roadmaster S/W w/ the...
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