I started running Mobil Delvac 1300 15w40 in my street car. Switching to delvac got rid of my small oil consumption issue, lowered operating temperatures by 7 degrees, and my oil changes haven't been cleaner. I has a higher ZDDP content than Royal Purple (1300 vs1100) I've used it in many motors before and I'm happy to announce it will be the only oil I run in my VQ's. This can be used in temps as low as -10 degrees (I live in CA). I mix one gallon of delvac with 1 quart of mobil 5w30. If you are having oil consumption problems, give this oil a try.

 

Interesting ....

 

In for updates

A lot of Subaru guys run Rotella

 

I'm sure it doesn't make a difference whether FI or not correct? This would def be easier for my as I run the 15-40 rotella in my dually.

 

what would the main advantage of this be?

 

All my friends and I started running this with SR20's and KA-T's in our drift cars. I recently completed a VQ swap in my S13 so I will be switching to delvac on my next oil change.

I don't consume oil anymore.
Lower operating temperatures.
Oil seems to be able to last longer.

 

Ya the oil consumption is a batch so that would def be good to put an end to that.

 

So just out of curiosity , if better why wouldn't nissan say to run this ?

 

because it has a higher content of zddp anti wear additives, they are great for engines themselves but they destroy cats and produce higher emissions so they had to eliminate them to meet emissions standards. same reason why diesel oils used to run around 1600 ppm of zddp and now depending on oil is around 1150-1300 and why regular gas engine oils used to be around 1200 and now are on average around 700.

also back in the 90s they moved away from flat tappet type cams and moved to roller type, in a OEM application the highest force in the engine was the cam and since they reduced the effort needed with roller style they didnt need as much of the zddp's since they are mostly for high pressure areas like the cams.

you will find a TON of story's about wiped out cam lobes from that time period because of the switch as well as company's trying to make cams on a cheaper softer alloy.

also btw our cam design is a flat tappet design, unless you want to run cats or live some place with strict emissions there is no disadvantage to running diesel or "heavy duty" as its now called oil's. but then again if you have strict emissions laws you probably arnt running significantly more power either.

forced performance did a great write up on it found here, its mostly about turbos but your main and rod bearings are the same exact journal type bearings, turbo sees higher speeds but engine sees higher loads.
http://store.forcedperformance.net/m...otor%20Oil.pdf

 

I'm not doubting you on this but I am curious on how you came to this conclusion? did you/do you have your oil tested (like blackstone labs) or is is a observation you've made while doing your oil changes?

very interesting...

 

This is strictly visual assumption. I'm was one of those dudes that used to do oil changes every 3.5k miles then started waiting until 5k miles. At 5k miles, the oil still has a nice color and did not turn BLACK like other oils i've used. I also burned ~3/4 of a quart every 5k and now the motor does not do that.

 

^ true. I run the XL Amsoil 10k interval oil but still change about 6k~ish miles and it still looks good. I do have to add check/+add oil almost every time I check the oil though. I'd like to not worry about adding all the time as well if this is a good solution. My diesel is on the money every time I check it in safe zone. .

 

I have an 03 350 and was wondering should I start to run this type of oil ? Will my 100,xxx mile motor like the change ? Or just stick with 5-30 Mobil 1 ? Intake and exhaust are only mods btw. Was only asking to know if this would extend the life maybe and because I never heard of this being done . Thanks

 

I suggest you give it a shot. Mix one gallon (4 quarts) of Delvac with 1 quart of your mobile 5w30.

 

Be careful with the assumption - As I understand it and I could be completely off my rocker but the oil performance is linked to the amount of detergent remaining in the oil.

I have my pickup (04 f150 5.4 v8) oil tested by blackstone and I am trending about 9000 miles per oil change, although I change before 8000mile mark.

it cost $40 to have a all inclusive test/analysis done. It's sorta a wash for me because it's a little over $40 to change the oil...

maybe you could have them run a few analysis on your changes to see where you stand -

interesting topic & post +1