I'm new here and I'm scouring these forums for answers. Sounds like there are a lot of smart people here. I don't see a direct, data based answer to my question so I'll post it here. But feel free to send me to another thread if I've just missed it.
I just bought a 3 valve 5.4 triton 2006 F150 with 167k miles that I'll be road tripping and off roading in a bunch. Currently I have it all apart to lock out the cam phasers. (Long story I found broken timing chain guides and a burnt cam (seized roller bearing on rocker arm) as well, so new cams, lifters and rockers as well as a timing components and the phaser delete...)
My mechanic friend tells me to "put Rotella T6 in absolutely everything. 15w in the summer and 5w in the winter." So last oil change I put T6 15w-40 in my 5.4 and my 2.9 V6 in my '86 Ranger (whole other story with the Ranger...)
I'm shopping for the next oil change now because the T6 was hard to find in stock last time. I read the Shell Q&A about their new Truck and SUV oil and I noticed two comments from Shell that confused me. One said that the T6 was for diesel engines and could damage cats in gasoline vehicles. The other comment said to use the T6 in conventional push rod type engines (like the 5.4 right?) because of the higher zinc content.
At the end of the day I want to know what the best oil for my 5.4 is, and I want to know why because I'm the nerd that just has to know why I do what I do. Could any of you all please expound? Or maybe point me to the words of Bob himself?
Extra credit: I run Lucas ZDDP in the 2.9l V6 because if the flat tappet lifters. I run maybe 15% Marvel Mystery oil in both the 2.9 and 5.4. And in the 5.4 I've been putting Seafoam in the oil a couple hundred miles before oil change (which I don't do on the 2.9 because I just rebuilt it). What are your thoughts on this practice?
I'll appreciate all your replies. I've been doing most of all my own mechanic work but I'm headed to medical school and I'm trying to get all my vehicles to the point where I (hopefully) just have to change oil.
I just bought a 3 valve 5.4 triton 2006 F150 with 167k miles that I'll be road tripping and off roading in a bunch. Currently I have it all apart to lock out the cam phasers. (Long story I found broken timing chain guides and a burnt cam (seized roller bearing on rocker arm) as well, so new cams, lifters and rockers as well as a timing components and the phaser delete...)
My mechanic friend tells me to "put Rotella T6 in absolutely everything. 15w in the summer and 5w in the winter." So last oil change I put T6 15w-40 in my 5.4 and my 2.9 V6 in my '86 Ranger (whole other story with the Ranger...)
I'm shopping for the next oil change now because the T6 was hard to find in stock last time. I read the Shell Q&A about their new Truck and SUV oil and I noticed two comments from Shell that confused me. One said that the T6 was for diesel engines and could damage cats in gasoline vehicles. The other comment said to use the T6 in conventional push rod type engines (like the 5.4 right?) because of the higher zinc content.
At the end of the day I want to know what the best oil for my 5.4 is, and I want to know why because I'm the nerd that just has to know why I do what I do. Could any of you all please expound? Or maybe point me to the words of Bob himself?
Extra credit: I run Lucas ZDDP in the 2.9l V6 because if the flat tappet lifters. I run maybe 15% Marvel Mystery oil in both the 2.9 and 5.4. And in the 5.4 I've been putting Seafoam in the oil a couple hundred miles before oil change (which I don't do on the 2.9 because I just rebuilt it). What are your thoughts on this practice?
I'll appreciate all your replies. I've been doing most of all my own mechanic work but I'm headed to medical school and I'm trying to get all my vehicles to the point where I (hopefully) just have to change oil.