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- RDX Aspec Adv.
Yeah, the rule of thumb is if there's a turbo or supercharger under your hood, you're buying the expensive stuff. That will help alleviate pinging/detonation though, not vibration at idle.
Bring it to a different dealership. That guy's 0 for 2. It's not normal and it's not the gas you use.
It's normal if you're used to other vehicles. The cx5 is very unrefined in the nvh department regarding its engine sounds. It's like the LS1 of economic 4 bangers. It has unique vibes, but its healthy.