Do I Need API SP?


Effects of too much soot in the oil. I'd think this would typically happen faster on a diesel then on a GDI engine (maybe about the same rate with a turboed GDI engine per link in post #57) if the oil was ran the same amount of time. Things start going wild at around the 3% to 4% soot level.

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What Toyota engine used direct injection back in the day?
Well, we have the 2GR-FSE, which was introduced in 2005. As I said however, they used dual injection (D4-S) which has both direct and port injection which other manufacturers are also implementing now, as it provides several benefits.
 
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