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Originally Posted by bluesubie
I get my 300V for free with Subaru Mastercard Rewards!  |
Well, not really free as you're forgoing other rewards programs. I flew to Japan on my credit card points this year.
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I think of long drain as the maximum allowed by Subaru (or maybe "long-ish"), since most people change well before that anyway. I'm guessing that the BRZ, and I presume the FR-S?, will be dialed back to 6,000 miles maximum beginning with the 2015 model year like the rest of the Subaru line-up (U.S.).
Not a long drain interval by any definition! I can see them dialing it back for certain cars in certain conditions (hard driven 86's, the turbo models, etc.), but it doesn't make since to do it across the board. Probably easier for dealers to remember.
-Dennis
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Subaru has short drain intervals as a rule, but that may be driven by conservatism in their recommendations. API and ILSAC specs don't differentiate between synthetic and conventional, so you could theoretically formulate a synthetic with an additive package capable of only 5,000 miles (think Amsoil OE). Given the lack of drain interval requirements in the oil specs Subaru has to recommend an interval which will be acceptable on every oil that meets them. That would include Valvoline Synpower, Quaker State UD, and the old Subaru/Idemitsu API SM 0w20. All the above have mediocre TBN retention at best, the API SM Idemitsu oil was awful in my Honda, lasting no longer than Honda's syn-blend 5w20. Oils like Pennzoil Ultra, Mobil 1 AFE and especially Mobil 1 EP are obviously capable of longer drain intervals, even in a Subaru.