I switched to royal purple (synth. obviously) oil last night. I dont want to sound like a 14 yr old that doesnt know a thing about cars and thinks that everything adds 600 hp, but I will say that I noticed a diffrence. My motor runs very smooth now, extreemly smooth actually. I notice when reving up its seamless rather than having a rough transitionbetween the lower rpmsand thesmoother top end, its just smooth all arround; which I feel actually helped to increase my low end power ever so slightly. I dont know all that much about the how the shortblock works in within itself, but Im theorising that I may have had slight blow by, and the synth helped to swell the rings a minute bit to help cure the problem. Anyone have any ideas on that? Anyways, If you are contemplating going with synthetic, I would second your notion.

 

I also switched to royal purple (about 3k ago) and i too noticed a small difference. I really noticed it in the oil pressure guage. It comes up quicker and is at about 5 psi more then w/ the regular oil (running about 65 psi which is normal). It just flows better, like any other synthetic oil, which allows the motor to oporate better. But, what are you using in the tranny and the diff. i want to go syn with those as well, but i dont think royal purple has any tranny fluid for our trucks. Can you use royal purple gear oil (in the diff) as long as you add the additive?

 

I felt the same thing whenever I switched to Amsoil Indy. It's not in your head.

 

i got 5 quarts of RP MAX-ATF sitting next to me =]]

gonna change mine next week when i have access to the lift at my school =]

 

lol good to know that.

im running regular oils but before long im going to switch to synth in them as well. Royal purple makes gear oil, and trans fluid. Idk if they make type 4 atf or not though. Check out their website or summit

 

Synthetic in the motor, tranny and diff will give about 3-4rwhp increase

 

I'll be switching my motor oil over to royal purple in about 9-10 hours...sometime between the time I wake up and go to work.

Alright, it's switched.

 

is that true or is the wink sarcasim?

 

I run Royal Purple gear oil along with motor oil in my truck. It seems to do fine. The gear oil already has the additive for a LSD so you don't need to add it.

 

What oil did you guys use exactly? What is the number for it?