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SoobieOut · 12-09-2012, 01:38 AM

I had two Merc 300D cars. drove them over a period of 10 years.

What I found was consistant 24-25 MPG, engines were non-turbo models. I had friends with 300D Turbo models getting close to 30 MPG.

Asked an expert in Mercedes one time about adding a turbo to one of my diesels. He said it would be far cheaper to buy a used Turbo Diesel, since there are vast differences between the Turbo and Non turbo diesels.

One of the issues I had with my 300D was keeping the injectors clean. I used additives like Techron which kept them clean for about 10000 miles per treatment.

Good luck with your project.

I think the newer Mercedes Diesel technology is hard to beat.

Here's a story of a test where they got 40 MPG running over 140 MPH for 30 days!!

World 100,000 mile record: 140 mph for 30 days averaging 40 mpg

12-09-2012, 01:38 AM	#8 (permalink)
SoobieOut Polymorphic Modder Join Date: Aug 2010 Location: Utah Posts: 307 2006 DaCivic Hybrid - '06 Honda Civic Hybrid 90 day: 45.16 mpg (US) Thanks: 188 Thanked 40 Times in 25 Posts	I had two Merc 300D cars. drove them over a period of 10 years. What I found was consistant 24-25 MPG, engines were non-turbo models. I had friends with 300D Turbo models getting close to 30 MPG. Asked an expert in Mercedes one time about adding a turbo to one of my diesels. He said it would be far cheaper to buy a used Turbo Diesel, since there are vast differences between the Turbo and Non turbo diesels. One of the issues I had with my 300D was keeping the injectors clean. I used additives like Techron which kept them clean for about 10000 miles per treatment. Good luck with your project. I think the newer Mercedes Diesel technology is hard to beat. Here's a story of a test where they got 40 MPG running over 140 MPH for 30 days!! World 100,000 mile record: 140 mph for 30 days averaging 40 mpg