Originally Posted By: dx92beater
Originally Posted By: skyactiv
Subaru specifically states in the owners manual that a heavier oil is required under certain driving conditions. WRX's & STi's beat up the best 5W30's and some owners claim high oil consumption until they switch to a 5W40. Visit the Subaru boards if your in doubt.
I'm thinking the best oil you can use is Pennzoil Ultra 5W40 with it's low NOACK rating.
You really need to learn more about your Subaru. That oil filter has the wrong bypass setting.
What filter has the wrong Bypass setting? I frequent the Subaru boards plenty, but I don't like to limit myself to a specific enthusiast demographic. I only bleed Mitsu as well. Wife and I have a fire and ice thing going on.
No aftermarket oil filter I've heard of specs the same bypass pressure as the OEM "turbo filter". Subaru specs this really small filter for the turbos, which is supposed to place the filter a few mm away from the exhaust manifold where all their turbo model oil filters are mounted. They have this high bypass pressure because apparently they don't want it bypassing unless absolutely necessary. I've just gone with an aftermarket filter anyways since I don't want any Fram filter in my engine. I had a stash of the old Tokyo Roki filters that I went through after several years.
As for the engine, in a technical discussion it's not "the same engine" as the STI. It's the same block and apparently the same intake. It's definitely not the same turbo, intercooler, ECU, and possibly not the same injectors. It also doesn't have the variable valve timing of the STI. The later WRXs had the same block too, but I wouldn't think anyone would say it's "the same engine", since there's a lot more to a modern engine than just the block, especially with all the electronics and turbo parts. I remember way back some magazine test got a ridiculous 0-60 time (something like 5.2 seconds) out of a Forester XT that other testers weren't able to duplicate. Most tests were somewhere in the high 6 second range.
Originally Posted By: skyactiv
Subaru specifically states in the owners manual that a heavier oil is required under certain driving conditions. WRX's & STi's beat up the best 5W30's and some owners claim high oil consumption until they switch to a 5W40. Visit the Subaru boards if your in doubt.
I'm thinking the best oil you can use is Pennzoil Ultra 5W40 with it's low NOACK rating.
You really need to learn more about your Subaru. That oil filter has the wrong bypass setting.
What filter has the wrong Bypass setting? I frequent the Subaru boards plenty, but I don't like to limit myself to a specific enthusiast demographic. I only bleed Mitsu as well. Wife and I have a fire and ice thing going on.
No aftermarket oil filter I've heard of specs the same bypass pressure as the OEM "turbo filter". Subaru specs this really small filter for the turbos, which is supposed to place the filter a few mm away from the exhaust manifold where all their turbo model oil filters are mounted. They have this high bypass pressure because apparently they don't want it bypassing unless absolutely necessary. I've just gone with an aftermarket filter anyways since I don't want any Fram filter in my engine. I had a stash of the old Tokyo Roki filters that I went through after several years.
As for the engine, in a technical discussion it's not "the same engine" as the STI. It's the same block and apparently the same intake. It's definitely not the same turbo, intercooler, ECU, and possibly not the same injectors. It also doesn't have the variable valve timing of the STI. The later WRXs had the same block too, but I wouldn't think anyone would say it's "the same engine", since there's a lot more to a modern engine than just the block, especially with all the electronics and turbo parts. I remember way back some magazine test got a ridiculous 0-60 time (something like 5.2 seconds) out of a Forester XT that other testers weren't able to duplicate. Most tests were somewhere in the high 6 second range.