Community Forums

J-N-Lham · 09-21-2019, 04:12 PM

We have a 2005 Bounder, Ford F53 with a 6.8L V10 engine. It has right at 46K miles on it and runs very good.
Question we purchased it used and the previous owner always used Valvoline Full Synthetic 10w30 oil in it. Not sure why. My self growing up we only used straight 30W. Have changed that choice with the times as now most manuals say 5w20.
I speculate the Previous owner used 10/30 as the vehicle spent time between Florida and Indiana or just his preference, I have used the same garage for service he did and just followed his previous work orders. 10/30 full syn. I am now going to change the oil myself. When looking at owners manual to get filter info I see it says to use Ford 5W20 and a Ford filter. have researched the filter and if it is what it says, seems it would be a good filter.
Now the oil I want to go with 5W20 and use full synthetic. Do you think I would be safe going from 10W30 to 5W20, dont want to cause any future problems. I have always used Valvoline but like what I read about Mobile 1. Thinking of that change too. I have read you have to be careful changing brands as some have different additives like detergents and such. Your knowledge, thoughts and opinions on weight and brand would be appreciated.
Thanks
Jack

jimmy braden · 09-21-2019, 04:27 PM

https://540ratblog.wordpress.com/201...-test-ranking/

shoot for something in the 75-90K psi range
Do at least one oil sample and dont try for extended oil change intervals.

Actually the generic amazon isnt bad - https://www.amazon.com/AmazonBasics-.../dp/B07C5FF8R5

And there is really no reason to go with 20anything other than just some marketing BS that maybe frees up about .05 MPG .. A good 5-30 will support 5000 to 6000mile OC internvals as long as temps dont go above about 250 consistently.

wildtoad · 09-21-2019, 05:45 PM

I like to keep things simple. I use the viscosity Ford says to use.

Waiter21 · 09-22-2019, 04:07 AM

Personally, I don't think you'll have any problems using different weights, brands, or synthetic..

I change oil every 5k miles. Since I bought my Southwind used a couple years ago, its burned 1 qt of oil every 1200 miles. So if I go over a thousand miles or so, I don't worry about it as it gets fresh quart ever 1200 miles.

I use dead dinosaur 5w20, mainly because I operate my Southwind during the winter months. (I tried 10w30 to see if this would reduce the oil consumption, it didn't.)

Motorcraft filter FL820S $3.50 from Rock Auto