Oil changes
Moderator (Ret.)
Joined: Sep 2008
Posts: 9,460
Likes: 486
From: Lake Mary Florida
How is the truck being used? Do you haul or tow with it?
A general rule is that semi synthetic oils can be used up to 5K. Full synthetics can go into the double digit ranges before requiring its change.
I tow a six thousand pound camper often, and use a full synthetic oil. I'll start looking for oil sale deals around the 6 to 7K mileage time frame. I usually do not leave the oil in it beyond 7K. Because of my towing, I installed an engine oil cooler.
A general rule is that semi synthetic oils can be used up to 5K. Full synthetics can go into the double digit ranges before requiring its change.
I tow a six thousand pound camper often, and use a full synthetic oil. I'll start looking for oil sale deals around the 6 to 7K mileage time frame. I usually do not leave the oil in it beyond 7K. Because of my towing, I installed an engine oil cooler.
Last edited by Mod (Ret.); Mar 3, 2016 at 04:40 AM.
Member
Joined: Jun 2015
Posts: 98
Likes: 5
I do mine between 3k-4k. Motorcraft 5w-20 Synth. Blend with the Motorcraft Filter. It runs me around $25~ to do it. I plan on being religious with these numbers as I've got 140k miles on my motor and don't have any Cam Phaser issues yet, so I'd like to keep it that way.
Senior Member
Joined: Feb 2013
Posts: 116
Likes: 5
Every 5k with Mobile 1 5w20 fully synthetic and Motorcraft FL820S filter. I unfortunately have the cam phaser tick but the truck's engine has ran great otherwise. I have 154k miles on it now and it had around 26k when I purchased it.
Monks
Joined: Jan 2016
Posts: 1,851
Likes: 249
From: Chuco Town, TX
I go about 5k-7k. I've gone as long as 11,000 with M1 EP 5w20 and a Fram Ultra filter. The truck burned a little of this oil, but it did ok.
My suggestion is if you want to extend your drain intervals is take a sample of your oil and send it to Blackstone Labs. They can do an used oil analysis on it and tell you how the oil is doing, or did, in YOUR truck. Only costs about 35 bucks and they'll also let you know the TBN of the used oil. This is how much of the additive pack is still available. This is what Ive been doing and have found that Walmart's Supertech Syn is actually a very good choice for my engine.
My suggestion is if you want to extend your drain intervals is take a sample of your oil and send it to Blackstone Labs. They can do an used oil analysis on it and tell you how the oil is doing, or did, in YOUR truck. Only costs about 35 bucks and they'll also let you know the TBN of the used oil. This is how much of the additive pack is still available. This is what Ive been doing and have found that Walmart's Supertech Syn is actually a very good choice for my engine.
Senior Member
Joined: Jan 2014
Posts: 1,186
Likes: 63
From: Indiana
I go about 5k-7k. I've gone as long as 11,000 with M1 EP 5w20 and a Fram Ultra filter. The truck burned a little of this oil, but it did ok. My suggestion is if you want to extend your drain intervals is take a sample of your oil and send it to Blackstone Labs. They can do an used oil analysis on it and tell you how the oil is doing, or did, in YOUR truck. Only costs about 35 bucks and they'll also let you know the TBN of the used oil. This is how much of the additive pack is still available. This is what Ive been doing and have found that Walmart's Supertech Syn is actually a very good choice for my engine.