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Discussion Starter #1 (Edited)
what brand synthetic should i run it? is rotella 5-40 any good?

just want to know if it is a good oil. ive been trying to read up on some of the oil threads. i already bought the dino oil rotella 15-40 but it seems like there are some opinion whether is a good oil for the psd (foaming up) does the 5-40 rotella have the same foaming up problem? i can get the rotella 5-40 for about $20 a gallon which isn't to bad. i ran some number and if swapping out the dino oil for synthetic and can gain only 1mpg with fuel being $2.60 a gallon i would basically get the extra $40 back in fuel saving(right now i usually see 17mpg hand calculated) i currently running moble one devac 15-40 dino oil... is it reasonable to expect a gain in mileage with the synthetic oils ? just something to ponder about ... i really want to run the extreme blue but no place carries it. does any one know of any big retail chains that carry it? or is there any other oil i should look for before setling on the rotella? i tryed to get the mc 5-40 at ford but they would have to order it for $180 so thats out of the question at that price i would go for ams oil or another highend oil.

thanks sorry for rambling on :icon_ford:

edit: i only want opition on oils that i can buy locally. the list is valvoline extreme blue 5-40, rotella 5-40, mobile one turbo diesel 5-40. im not sure if the napa has the extreme instock but if they dont which would you buy between rotella and mobile one? thanks again
 

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Well in all my diesel trucks.....its either Valvoline Premium Blue 15w40 dino......or Valvoline Premium Blue Extreme 5W40
 

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Discussion Starter #3
where do you find the extreme blue or do you order it? my local advance auto parts has the premium but not the extreme.
 

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NAPA or Oreilly Auto Parts either has it in stock or can order it for you!
 

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Discussion Starter #5
ok i will check napa tomarrow morning, there are no oreilly stores in my area . how much is a gallon of extreme blue usually cost? thanks again harleyf250guy



and if anyone has anything to say about the rotella 5-40 please leave a comment .

i also saw on autozone website that they carry mobile 1 turbo diesel oil which is a 5-40 oil too and it says the have it in stock at the local store for $6.99 a quart.
 

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The last time I bought it, it was on sale for $21 a gallon. Normally it is around $24. In my opinion I would hold off until you could find some extreme. The Mobil 1 stuff is gonna cost you $28 per gallon by the you buy 4 quarts @ 6.99. That's pretty dang expensive......I would wait....but I am a Valvoline guy.......
 

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Discussion Starter #7
good deal. is that $24 at napa hopefully its on sale. i thought the extreme was a bit more then that (+$30 a gallon) so its good to hear its price comparable to the rotella. i really need a oil change a little over 4000miles on the dino mobile one delvco . so im really need to get it done tomorrow have a 300mile trip planed for sunday. i guess if i cant find the extreme i will go with the rotella 5-40 which should be better then the oil im runing now...

i will check back in the morning hopefully a few more people will post but it is a friday night...
 

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I put synthetic in my truck for the first time and I used Rotella, Wal-mart has it here for 19 a gallon. I got the truck in March and have used dino Rotella till now. It helped with a cold start issue and with injector stiction issues when the truck is cold. I am pleased but no long term feedback yet.
 

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Discussion Starter #9
The last time I bought it, it was on sale for $21 a gallon. Normally it is around $24. In my opinion I would hold off until you could find some extreme. The Mobil 1 stuff is gonna cost you $28 per gallon by the you buy 4 quarts @ 6.99. That's pretty dang expensive......I would wait....but I am a Valvoline guy.......
het harleyf250guy - i just got of the phone with napa they had 1 gallon in stock but they are going to order be 3more gallons it will be here by tuesday. and its on sale at napa for $17.99 hopefully my truck can hold of a few more miles for the good stuff . i which i had more money to spend so i could buy a couple cases at that price...
 

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Good deal.....I need to call my local NAPA and see if it is on sale here. I am gonna stock the hell up haha.
 

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Do you guys ever really notice changing to synthetic?
 

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Wow just checked here at my napa and its the same, 10.99 for the 15w40 and 17.99 for the 5w40. Needless to say I'm stocking up!
 

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Sale is at all the napas until the end of the month.
 

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Thanks for lettin me in I use the same oil. Just not synthetic but I may try it this time.
 

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Discussion Starter #15
glad my phone call this morning help you guys out i had to call back just to make sure it was the diesel oil and not the snytech or what ever the valvoline 5-40 car oil is called...

do you think i should either . drain what i have in my truck now and run the rotella 15-40 for 500-1000miles and then drain that to try and most of the soot out of the motor for the synthetics? i will probable run the extreme blue 5-40 from here on out... or should i just run the extreme blue for 2000-3000miles . and then change it ... i know i need a old change bad it was feeling kind of sluggish yesterday and im up around mid 4000mile...

heck for $30 more i think it well worth it for anyone in the colder states if it really help starting like everyone says it does. i had to plug mine in last year when it got down in the lower teens and single digits... also if you see any increase in mpg you pretty much get most of you money back if not all of it....

do you guys still drain at 4000 or 5000 miles with the synthetics?
 

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I immediately noticed a change while switching to synthetic. Much easier turn over starts in the morning, especially during winter. Truck sounded quieter, and I noticed a slight improvement with my MPG. I change mine every 4-5k miles but that is typically with a lot of freeway miles in relative short amount of time.
 

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Ditto on the Valvoline. 5w40 extreme part #VV70518= full synth. Premium Blue 15W40 Part# VV70509= blend, they start with a dino base stock, and build it from there.
 

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I have talked to a couple of Ford techs and service managers and they said Ford recommends MC15W-40 or Rotella 15W-40. They also told me that If you can get it they are going to start recommending 10W-30MC or Rotella.
 

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I have talked to a couple of Ford techs and service managers and they said Ford recommends MC15W-40 or Rotella 15W-40. They also told me that If you can get it they are going to start recommending 10W-30MC or Rotella.
The manual states to only use 10w-30 in sub 20 or 30 degree temps. I don't remember which one.......
 

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Do you guys ever really notice changing to synthetic?
It runs smother when I forget the block heater in the morning. The other big noticeable thing is that the eng is cooler when I tow.
 
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