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  1. K

    Cost/Performance Synthetic for Extended Interval (time, but not mileage)

    I never found a good explanation for the symptoms. Best I could come up with is increased drag with older oil causing slightly missed rev matching on an auto. Yeah, my OCI isn't extended compared to people going 15-20K. The reason I do an oil change is because the very slight kicking bugs me...
  2. K

    Cost/Performance Synthetic for Extended Interval (time, but not mileage)

    Thanks for the advice, on the fence on whether to go with the Fram Ultra or wait for the Mobil 1 rebate.
  3. K

    Cost/Performance Synthetic for Extended Interval (time, but not mileage)

    Since the crazy Mobil 1 Synthetic deals (5 qt + filter for ~$20 after MIR) seem to have dried up, which synthetic has good cost/performance for extended intervals on an 06 Acura TL (at 90K)? I only drive about 5K/yr, so I have been running extended time intervals (usu ~12 mo, but did an 18 mo...
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