Hello Memebers! This is my first post here, so bear with me. I have long been an avid fan of two fully synthetic oils; Mobil One and Amsoil which I have used exclusively in my 2003 F250 Superduty with a 6.8L V10. For my last four oil changes I have dropped using the Amsoil brands strictly because I can buy the 5 quart jugs at Walmart for far less money per quart than the six requisite quarts of Amsoil, not to mention the added shipping costs.
I use the truck often in the warmer time of year to tow a big 5th wheel trailer through hot deserts and high mountain passes and I will regularly hit 3,500 to 4,500 rpm for long stretches of desert grades throughout the Mojave, Nevada, and Utah deserts often in temps of 114 degrees. Rarely do I hit 5 grand rpms but it has been known to happen ascending 9% grades (or more) between Cedar City, Utah
and Duck Creek, Utah Topping out well over 9,000 ft elevations.
I'm giving you all this background information to ask one simple question. My odometer has just passed 100,000 miles. I'm getting ready to make several camping road trips and am wondering if I should stay with the factory recommended viscosity of 5W-20? I just changed the oil last week and used the Mobil 1 gold label 5W-20 Extended Performance oil. However, given the fact my engine has now 100k on it, I am wondering if I should use from now on their Mobil 1 5W-20 High Mileage Advanced Full Synthetic Motor Oil? OR----should I just move one step up to a higher viscosity —say 5W-30? Yes, it is using some oil now between changes unless I don't tow on some road trips. I'd say it uses about 1 qt to every 1 K miles which isn't all that bad given the thrashing that engine takes.
Comments, opinions, and experiences will be appreciated.
I use the truck often in the warmer time of year to tow a big 5th wheel trailer through hot deserts and high mountain passes and I will regularly hit 3,500 to 4,500 rpm for long stretches of desert grades throughout the Mojave, Nevada, and Utah deserts often in temps of 114 degrees. Rarely do I hit 5 grand rpms but it has been known to happen ascending 9% grades (or more) between Cedar City, Utah
and Duck Creek, Utah Topping out well over 9,000 ft elevations.
I'm giving you all this background information to ask one simple question. My odometer has just passed 100,000 miles. I'm getting ready to make several camping road trips and am wondering if I should stay with the factory recommended viscosity of 5W-20? I just changed the oil last week and used the Mobil 1 gold label 5W-20 Extended Performance oil. However, given the fact my engine has now 100k on it, I am wondering if I should use from now on their Mobil 1 5W-20 High Mileage Advanced Full Synthetic Motor Oil? OR----should I just move one step up to a higher viscosity —say 5W-30? Yes, it is using some oil now between changes unless I don't tow on some road trips. I'd say it uses about 1 qt to every 1 K miles which isn't all that bad given the thrashing that engine takes.
Comments, opinions, and experiences will be appreciated.