I know this has been a very common post but i am getting ready to buy/install new injector nozzles. my 617 has 325,000 on the clock and is seriously overdo because i am getting terrible mileage/performance and very loud knocking at idle. I have done quite a bit of research on both nozzles and can't find any information regarding which one would better increase the mileage and performance. mileage is the most important factor for me. thanks...

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• 1993 Mercedes-Benz 400E *146,000 Miles*
• 1985 Mercedes-Benz 300SD Turbo Diesel Biodiesel *SOLD @ 346,000 Miles*
• 1984 Mercedes-Benz 300D Turbo Diesel Biodiesel *SOLD @ 284,000 Miles*