Ghost10
Full Access Member
- Joined
- Feb 16, 2017
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I have a 2018 5.3
No tune, a MIT tube drop in filter, magnaflow clone muffler.
I am a marketing sales manager and drive about 90+ mi a week.
After a 2 months trial of using 87 and 89 octanes.
I get the most MPG and Performance using 89. One other note the exhaust fumes smell better with 89 too. I only use Chevron gas, sometimes I’ll use 76 gas.
Anyone have comments ? I do believe blackbear recommends 89 with my year due to the compression ratios
No tune, a MIT tube drop in filter, magnaflow clone muffler.
I am a marketing sales manager and drive about 90+ mi a week.
After a 2 months trial of using 87 and 89 octanes.
I get the most MPG and Performance using 89. One other note the exhaust fumes smell better with 89 too. I only use Chevron gas, sometimes I’ll use 76 gas.
Anyone have comments ? I do believe blackbear recommends 89 with my year due to the compression ratios