Both m y 2018 Forester XT and '22 Forester have DI. All subaru carlines started DI only in their unturboed vehicals (FB) in 2019. Tha FA mostly turboed has been Di for like a decade I believe. I have been doing the CRC intake and turbo cleaner every 7,500 miles. CRC recommends every 10,000 miles. The process takes 20 minutes it consists of about 250 individual sprays. The before and after pictures on Youtube are shown where the buildup has reached overload on buildup. The "after" pics are much improved but not great. 50% of terrible is still terrible.
CRC claims "up to 46 percent removal". After the 1 hour heat soak a lot of smoke comes out the tailpipe. I hope it is coming from the carbon on the valves but who knows. I was planning on walnut blasting my '18XT at 50,000 miles, but that is about the time my extended warranty runs out. My '22 has 13,000 on it. I may not have it long enough to see if there is buildup.
Obviously this DI only is being used bc it delivers increased performance and efficiency. I am guessing more DI + Port injection will be used going forward. MY '22 Forester does get 33 mpg+ on the highway and 26 around town. Pretty good for a vehicle with fuyll-time AWD and aerodynamics of a brick.
CRC claims "up to 46 percent removal". After the 1 hour heat soak a lot of smoke comes out the tailpipe. I hope it is coming from the carbon on the valves but who knows. I was planning on walnut blasting my '18XT at 50,000 miles, but that is about the time my extended warranty runs out. My '22 has 13,000 on it. I may not have it long enough to see if there is buildup.
Obviously this DI only is being used bc it delivers increased performance and efficiency. I am guessing more DI + Port injection will be used going forward. MY '22 Forester does get 33 mpg+ on the highway and 26 around town. Pretty good for a vehicle with fuyll-time AWD and aerodynamics of a brick.