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synthetic

  1. VW Jetta MKV 2005.5–2010
    I just got my '08 Jetta (2.5 engine) back from its 20,000 mile oil change, and it looks like they put in conventional motor oil (Castrol GTX) instead of the synthetic it was running (Castrol SLX). Bottom line: do I need to go back and have them re-change it? Or will I be okay running on the...
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