Prefers black cats
'18 and '19 Crosstrek Limiteds
Same here - we live at sea level, close to the beach. It's not noticeable going to the nearest mountain resort, Big Bear, at 6,700ft but is when we get up to 10K or so in the Sierras.Actually on the road, the CVT works better for mountainous area due to gear ration is higher. I believe the key for unmodified engine is to get the latest ECM update (I find this play the biggest change on mid rpm driveability), make sure the fuel system is good (you can use Techron, Redline SI-1, CRC GDI Intake Cleaner or any PEA based cleaner), use good quality synthetic oil and the sparkplug is clean. If you want to modify exhaust, you may try STI exhaust, which at least has been tuned by Subaru. So far I do not have any power issue up to 6200 feet.