Just ordered me some DT40

[Pdwight]

While it may look expensive it is really the same price as Royal Purple....this is my winter oil change so we will see

[Gelbster]

Did you take advantage of the deal from RND ?

[Pdwight]

I guess not, this was 12 quarts shipped for $129 free shipping

This will also be a chance to see what my magnetic oil filter housing picked up (I hope nothing)

[10/10ths]

....and the sale price wasn't any better than the price on Amazon.

I've done three oil changes with the DT40 since I got the car back from Jake and Flat 6 Innovations where they fitted the "IMS Solution".

As part of the deal, I agree to only use DT40.

Fine with me, not really any more expensive than Motul 8100.

Oil is cheap, engines are expensive.

After a 5,000 mile trip to Colorado and back from my Louisiana home in my 2004 SE, she only dropped one quart. And that was crossing multiple 10,000 foot passes and lots of hard throttle under load at altitude.

One nice thing about the DT40, which you should change every 3,000, by the way, is that you can hear when you need to change the oil. When the oil is fresh and clean, the lifters and cam chain tensioners are quiet on cold start. When you hit 4,000 miles on the oil, you will hear "Click & Clack, the Tappet Brothers" while they pump up.

That's a friendly reminder to change the oil.

My old 1993 Miata was the same way, I knew when it was time to change the oil because I could hear the lifters pump up on startup.

My magnetic plug has been spotless so far. Again, three changes, and 13,500 miles since the IMS Solution install and the other items I had R&R'd while Jake was in there.

DT40: Better living through chemistry!

[JayG]

Motul 8100 is about 1/2 the cost of DT 40

~$123 for 20 liters on amazon

[10/10ths]

.....okay, so the Motul is a lot cheaper.

I'll take American engineered specifically for our cars oil at twice the price.

Cheaper than a blown engine.

[Flavor 987S]

Originally Posted by Pdwight

While it may look expensive it is really the same price as Royal Purple....this is my winter oil change so we will see

Don't forget the 200-400 mile flush with BR30 first. Now it's not cheaper than RP. Oh well.

[kk2002s]

Originally Posted by 10/10ths

....
One nice thing about the DT40, which you should change every 3,000, by the way, is that you can hear when you need to change the oil. When the oil is fresh and clean, the lifters and cam chain tensioners are quiet on cold start. When you hit 4,000 miles on the oil, you will hear "Click & Clack, the Tappet Brothers" while they pump up.

That's a friendly reminder to change the oil.
.....
DT40: Better living through chemistry!

I don't think that is a good selling point, losing it's lubricating effectiveness after only 3-5k miles

[Jgkram]

Unless you track/AX hard or often, as long as you change your oil religiously every 3k miles it really does not matter as long as you use a good grade oil. If it buys you peace of mind then use DT40. If you prefer to invest your money in something else then do that. Either is really ok.

[JayG]

Originally Posted by Jgkram

Unless you track/AX hard or often, as long as you change your oil religiously every 3k miles it really does not matter as long as you use a good grade oil. If it buys you peace of mind then use DT40. If you prefer to invest your money in something else then do that. Either is really ok.

That's pretty much true

IIRC, DT 40 is not recommended for use in racing.
I know many that use Motul 8100 in their race cars. From what I have been told, it has superior high temp sheer. Basically it continues to lubricate at higher temperatures

Does anyone have any empirical data that shows DT 40 is superior other than what a specific person has said?

As far as needing oil between changes, my car rarely needs more than a few oz's between oil changes and that has been true with M 1 as well as Motul which I switched to earlier this year

[Pdwight]

Originally Posted by Flavor 987S

Don't forget the 200-400 mile flush with BR30 first. Now it's not cheaper than RP. Oh well.

Is this really necessary ?

I just drive my car 3K miles per year and never at a track

[JayG]

Originally Posted by Flavor 987S

Don't forget the 200-400 mile flush with BR30 first. Now it's not cheaper than RP. Oh well.

Originally Posted by Pdwight

Is this really necessary ?

I just drive my car 3K miles per year and never at a track

All depends on what flavor of kool-aid you drink

When you drain the oil, not all of it comes out and God forbid you mix another oil with DT40

The reason given to use BR30 is to flush out all the inferior oil left in the engine

[thstone]

Originally Posted by Jgkram

... as long as you change your oil religiously every 3k miles it really does not matter as long as you use a good grade oil.

^^^ What he said!

[Pdwight]

Really , I just do not see this as the DT40 cannot be that different for a pleasure car than any other high grade full synthetic. I do not want to drop 100 bucks on break in oil just to change to another brand of oil......how much different can the break in oil be from the DT40....looks like DT40 may have been a terrible choice in oils

[JFP in PA]

OK guys, cool your jets.

Switching to DT40 from another oil you have two choices: Do a "belt and suspenders" pre flush to remove every trace of the old oil, or just do a simple oil change and switch to the DT40.

We have many customers using the DT40, myself included, and none of the cars were pre flushed. To date, all of the UOA's look excellent.

And you really do not need to change your oil every 3K miles, 5K is just fine.

[TrumpyAl]

Originally Posted by JFP in PA

OK guys, cool your jets.

Switching to DT40 from another oil you have two choices: Do a "belt and suspenders" pre flush to remove every trace of the old oil, or just do a simple oil change and switch to the DT40.

We have many customers using the DT40, myself included, and none of the cars were pre flushed. To date, all of the UOA's look excellent.

And you really do not need to change your oil every 3K miles, 5K is just fine.

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

[morgal48]

Received an email from LN advising that if one buys a case of DT40 they will provide free oil analysis with that purchase. If analyzing your oil is in your future, this lowers the price of the DT40 a bit.

[steved0x]

Originally Posted by TrumpyAl

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

I would say safe, except I would change it from personal experience to professional experience as JFP has done thousands of oil changes for his Porsche customers and hundreds (thousands?) of UOA.

Also he is saying 5K miles (5000 miles) vs 5000 km.

That said I changed my DT40 every 6 months/3,000 miles for the couple years I used it and always had a good UOA, even on the first one where I did not flush (previous fill Castrol Edge 5W40). If they made an XP9 that had a drain interval greater than 750 miles I would have switched to that since I am doing mostly track but with the drive to/from that equated to a full oil change each track weekend.

Now I am using Millers Nano 5W40, I am getting ready to do my first UOA and see how it did. That oil can (supposedly) stand up to the heat and stress of track use, and has a longer lived additive package, that should allow me to get back to a 3,000+ mileage interval while still holding up to track use, and this longer life should offset the higher cost of the oil. We'll see I have one more track event this weekend and then it is UOA time

[JayG]

Originally Posted by steved0x

I would say safe, except I would change it from personal experience to professional experience as JFP has done thousands of oil changes for his Porsche customers and hundreds (thousands?) of UOA.

Also he is saying 5K miles (5000 miles) vs 5000 km.

That said I changed my DT40 every 6 months/3,000 miles for the couple years I used it and always had a good UOA, even on the first one where I did not flush (previous fill Castrol Edge 5W40). If they made an XP9 that had a drain interval greater than 750 miles I would have switched to that since I am doing mostly track but with the drive to/from that equated to a full oil change each track weekend.

Now I am using Millers Nano 5W40, I am getting ready to do my first UOA and see how it did. That oil can (supposedly) stand up to the heat and stress of track use, and has a longer lived additive package, that should allow me to get back to a 3,000+ mileage interval while still holding up to track use, and this longer life should offset the higher cost of the oil. We'll see I have one more track event this weekend and then it is UOA time

Gee thanks Steve!
Introducing yet another oil, one that is even more $ than DT40 LOL
In looking at the specs, it is very similar to Motul 8100, with Motul maybe being slightly better spec, if I am reading them correctly.

In any case, looks like a very good oil

https://www.motul.com/system/product_descriptions/technical_data_sheets/52/original/8100_X-cess_5W-40_(GB).pdf?1458898826

CFS 5W40 NT - $19.95 : Performance Racing Oils - Millers Oils

And would agree that flushing the oil is a waste of $$. It really only matters to what a UOA says

[steved0x]

Originally Posted by JayG

Gee thanks Steve!
Introducing yet another oil, one that is even more $ than DT40 LOL

It makes the others look cheap! It is an expensive kool aid for sure.