Forum: Performance and Technical Chat
06-15-2019, 06:17 PM
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Replies: 29
Views: 3,039
For the 993 series, it is recommended by the...
For the 993 series, it is recommended by the mechanics I trust to use chevron supreme or Chevron fuel system cleaner every 5th tank to keep the valves from coking, which is a known problem for those...
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