Just ordered me some DT40

[JFP in PA]

Originally Posted by TrumpyAl

Is it safe to assume that you are basing the 5000 miles advice on personal experience backed with lab analysis?

Yes to both.

[jrebot2]

Or any porsche approved oil you can buy at Walmart where they have the best prices. In my opinion, paying that much for oil for DT40 is a waste of money. I have it in my car only because the former owner just changed it for me before I bought it.

[jrebot2]

What do you use?

[fanguy]

Just called L&N @ 815-472-2939

Said I was thinking about changing from Mobile1 to DT 40 5-40. He asked me about my car & engine. Here were my questions.
1. Would I need to do a flush with BR 40? He said not needed just change filter and get a good drain.
2. What is the recommended oil change interval? He said 5K or 6 months if you drive less than 5K a year. Some people change at 3K and if you like you could but really wasn’t a need.

Then called Driven Racing Oils @ 855-565-5650
Asked question # 1 and he suggested I speak with Scott in the technical development lab.

So, I asked Scott question 1 His answerer was the following.
“I am very familiar with the chemical structure of Mobile1. Being than DT & Mobile1 have the same base oil it is not a problem to change oil at an oil change. He said I can tell you how this comes about. If you change from an Esther based oil like Red-Line to Mobil1 or DT you would need to do a flush. If you do this without a flush you will get 40% decrease in Horse Power due the leakage on the Ring Seals and then folks think this oil stinks I’m going back to Red-Line.

Second question oil change interval? We recommend 5K for normal mixed street driving. If you driving is more at highway speeds and you wanted to extend beyond the 5K you could but wouldn’t go more than 7k.

Asked if I had any more questions and I not at this time and I appreciate him taking the time to help me make an informed decision. He said that’s why we’re here and call back if you have more questions.

[JayG]

Originally Posted by fanguy

called Driven Racing Oils.....
If you change from an Esther based oil like Red-Line to Mobil1 or DT you would need to do a flush. If you do this without a flush you will get 40% decrease in Horse Power due the leakage on the Ring Seals and then folks think this oil stinks I’m going back to Red-Line.

Really??????

[fanguy]

Jay,

I truly appreciate you quoting me, maybe next time you could be more careful on the edit.

You referenced I called L&N and next was the response that was said from Driven and omitted the L&N response.


Here is the Driven response, cut & paste no edit.

“”Then called Driven Racing Oils @ 855-565-5650
Asked question # 1 and he suggested I speak with Scott in the technical development lab.
So, I asked Scott question 1 His answerer was the following.

“I am very familiar with the chemical structure of Mobile1. Being than DT & Mobile1 have the same base oil it is not a problem to change oil at an oil change. He said I can tell you how this comes about. If you change from an Esther based oil like Red-Line to Mobil1 or DT you would need to do a flush. If you do this without a flush you will get 40% decrease in Horse Power due the leakage on the Ring Seals and then folks think this oil stinks I’m going back to Red-Line.””

I have read about going from Mobil1to DT40 on several forums finding conflicting information. So I called L&N and DT40’s manufacture Driven to move beyond the conflicting info and Driven who should know if their oil needs a flush. According to Driven from Mobil1 to DT40 no flush required.

Thanks for a good laugh before going to bed.