My switch to Diesel Oil
Joined: Jan 2008
Posts: 1,469
Likes: 46
From: North Bay 707
My switch to Diesel Oil
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.
Joined: Jan 2008
Posts: 1,469
Likes: 46
From: North Bay 707
I've used it in all of my drift cars with great results. I recently started using this oil. My consumption was about 3/4quart every 5k miles.
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
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
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