As a Stock Car driver myself we only use mobile 1 in everything.. even the race car. Well now we use Joe Gibbs racing oil but that's not for a hemi lol.. MOBILE 1!

Tony Stewart!

 

I've used Amsoil 0w-30 since 06 (about 50k on odo) and today I'm about at 198k...change it every 25-30k miles (Amsoil intervals with oil bypass system)...

 

Mobil 1 with Lucas synthetic additive and Fram filters.

 

just did my first oil change (me personally, shops all the others), and put Royal Purple w/ purolator filter in it. saw a 1mpg increase. i have a 4.7. runs tip top. now on to the plugs this week

 

I just changed mine and am presently running Mobil1 with a K+N Filter. Will run Amsoil when I become a dealer for it. The reason for this is because of what I saw with my Harley. I run Amsoil exclusively in my Harley now, and it made a HUGE difference in oil temperature in the oil tank. The temp dropped 15 degrees changing from Mobil1 V-Twin oil to Amsoil. So yeah, the Ram will get Amsoil as well. Can't say enough good things about Amsoil.

Ripper

 

Quaker State 0W-40, in a Durablend if possible.

 

I run Royal Purple across the board Eng, Trans, and Rear end. I use a K&N filter and every 4k or so. Even though we are mostly using Synthetics, it still gets just as dirty as if you were using Dino oil. Why take the chance?

 

Mobil1... I just changed mine after 5k. My '03 has 175k on it. Still fairly clean..Meaning it was not black or much different color from fresh. I believe I use the Fram 6X filter the last couple of changes.

 

Just wanted to bump this up for some opinions. My '06 with the HEMI (and MDS) is throwing a P1521 code (incorrect oil viscosity) and I'm actually running Penzoil Platinum 5W-20 (changed about 2.5K ago). Has anyone else had this issue?

If not, what oil and weight are you using in your MDS-equipped HEMI trucks?

Thanks!

Edit: After I replaced my EGR valve (was also getting a fault code on that), the P1521 code went away, as well. Also checked my logs and the oil was changed about 1.5K ago, not 2.5K.

 

Haven't seen that at all. I've been using the 5 20 in my mds 1500 and I run it pretty hard and tow about 7000lbs with it at 70-75mph about 5 times a year.