Hey guys just changed my oil and went to the Mobil full synthetic 5-40. Since i have been in the oil business, i have learned alot about oil and power service additives. Just wondered if any one else has done the same.

i am running synthetics.

listened to the cummins engineer speak at a seminar. he said if you love your engine, weather a diesel or a gasser use synthetic. he didnt name a brand. just said use it.

Well I just went to Amsoil in the Engine and the Front and rear Diff. So I am on the band wagon now ;o)

Hey akchevyman, I am a exxon mobil/conoco phillips distributor and not to sound down on amsoil, but they use a mobil base stock. Look me up i can save you about $120 on your next oil change with a full synthetic that beats amsoil on all certs. By the by don't run it for 50,000 to 100,000 miles. no oil is that good. once soot laiden, it degrades.

Here you go you can check for yourself but i got these off the sites:

Amsoil:
APPLICATIONS
AMSOIL Premium CJ-4 Synthetic 5W-40 Diesel Oil is recommended for diesel engines and, where appropriate, gasoline engines requiring any of the following specifications:

• SAE 5W-40 • API CJ-4, CI-4+, CF, SM
• ACEA E7, E9 • Mack EO-O Premium Plus
• DDC Power Guard 93K218
• Caterpillar ECF-3, ECF-2 • Cummins 20081
• Volvo VDS-4 • MB 228.31 • MTU Type I & II
• MAN 3275 • JASO DH-2 • Global DHD-1
• Renault RLD-3

The new Kendall (conoco phillips) with titanium

Super-D XA meets or exceeds the requirements of:
• API Service CJ-4, CI-4, CH-4, CG-4, CF-4, SM
• API CI-4 PLUS (SAE 15W-40)
• ACEA E7-04, E5-02, E3-96 (SAE 15W-40)
• Caterpillar ECF-3, ECF-2, ECF-1a
• Cummins CES 20081
• Detroit Diesel Power Guard 93K218 (SAE 15W-40)
• International (Navistar) diesel engines
• JASO DH-2 (SAE 15W-40)
• Mack EO-O Premium Plus (SAE 15W-40), EO-M Plus (both grades)
• Mercedes-Benz Sheet 228.3, 228.31 (SAE 15W-40)
• Renault VI RLD-3 (SAE 15W-40)
• Volvo VDS-4, VDS-3, VDS-2 (SAE 15W-40)
Features/Benefits
• Exclusive Liquid Titanium™ additive technology for enhanced oxidation
resistance and protection against engine wear
• Excellent protection for new 2007 emissions-compliant engines and older diesel
engines
• Specially formulated to protect exhaust aftertreatment devices
• Outstanding soot control for protection against abrasive wear and soot-induced
oil thickening
• Outstanding resistance to viscosity and thermal breakdown at high temperatures
• Protects against sludge and varnish formation
• Protects against rust and bearing corrosion
• Excellent low-temperature pumpability with soot-laden oil
• High shear stability
• Good resistance to foaming and aeration

Good info! I think I'm going to switch to synthetic tranny, and diff fluid when they are ready for a change and I build my tranny. My motor will get delo 15w40. Used it for a while now and I really like it.

are you local jmono? dont get delo. it is waaaay over rated. and they dont let anyone tell you that the delo le is a synthetic. its not. with the new stuff out, it is one of the low grade oils now believe it or not..come see me ill hook you up if your local to nampa.

I went from dino 15W40 last winter and switched it to 5W40 synthetic. Now I'm back to dino 15W40. I've read that the PSD advances the timing considerably upon cold starts expecting a 15W oil in there. The 5W40 is much thinner and causes pre injector firing which scores the cylinder heads. I'm thinking about going with a 15W40 synthetic blend.

PM me some prices Tinman. I am localish. Mtn. Home but am in the area alot.

sorry mechelement, you may have some bad info. Bieng a full synthetic, you have a gazillion ( a bit of an exaggeration but you get the drift) times more protection with a syn rather than a regular oil. Also, the 5w part increases viscosity as the truck warms to a 40w. so the easy pumping, fast priming, is a plus on cold starts. with the powerstroke's oil fed injectors, the full synthetic lighter oil makes less work on them. As for the timing, i may be waaay off but dont you need spark plugs and a distributor? With cam and crank sensors, the computer cant fire an injector prematurely before the sensor crosses the magnet? can it? It relies on it..never heard of that one. I know that with the older engines when it gets down to -20ish some injectors plunger will stick, causing a knock. But after working up at tamarack resort, and not plugging my truck in at -20 i never had 1 problem. The bottom line is, a FULL SYN is not bad even with a 5-40. Now the new cars are using 0-20! crazy eh..