Does anybody add Rislone when changing oil in their 2004 and newer F150s? I have been using Rislone for the past few years in my 1998 Voyager to help keep sludge buildup under control, however, I am not sure whether to start using it in my 2004 4.6L F150 with 36k miles. Any opinions on this?

 

There is no need to add any oil supllement to your engine oil.

Just follow the service schedule in your owners manual and use the factory-recommended spec oil. If in doubt, use the SEVERE SERVICE schedule since it applies to far more vehicles than most owners realize.

Steve

 

It's possible they can deny warranty repairs to your engine should they become aware of you adding engine oil treatments. The best thing to do is use the motorcraft 5w-20 semi-synthetic oil and a motorcraft oil filter for your maintenance. Alot of posts have been made regarding this issue, and this seems to be the best advice with regards to the oil changes on these trucks. (this comes from a staunch user of Mobil1 full synthetic and Mobil1/Mann oil filters on all his vehicles for the last 10-12 years).

 

Be aware that your owners manual specifically states not to use any additives.

With that said oil today is much better then in the past as someone has stated, adhere to the manufacturers change intervals and product specs and you will not see any sludge.

 

Hi guys, new to this section of the forum (I'll make an intro later)

Was searching for posts on Rislone and found only this one.

This morning, I went to see a trusted mechanic and he recommends Rislone for that knocking noise in our engines (5.4 3v)

He said it should take care of the varnish in the oil passage that lubricates the timing chain tensioner (which he thinks might be making the noise)

way to drudge up an old thread, i know i know.

 

There is a check valve in the recomended motorcraft oil filter that does not allow oil to drain from the timing chain tensioner and keeps it from making noise at startup.

 

Thanks for replying on this air1jpg . . . can you please expound on your answer? To me, as a newcomer to this truck/engine, the idea that the oil filter can actively affect the timing chain tensioner which is a good foot away lets say . . . is obscure at best. How can it do this? Thanks

 

The check valve is a one-way valve that prevents the oil from draining from the timing chain tensioner when the engine is shut off. When you re-start the engine, the chain will not rattle the short time it takes for the oil pressure to come back up.

 

Ok, I understand the concept, what I meant was . . . how is it actually possible that a check valve in the oil filter can affect a part that is at LEAST a foot away if not more.

 

Get yourself a glass of water and a clear plastic straw. Insert the straw into the glass of water. Place your finger over the top of the straw (creating a air tight seal) and remove the straw from the water. You will notice that there is water trapped in the straw. Rotate the straw 180 degrees while keeping your finger on the straw. The water will remain in the straw. Removing your finger will cause the water to flow out the entire length of the straw...

Your finger in this example acts much like a check valve. I also have one on my sump pump which prevents water from flowing back through the pump after it shuts off.

 

OOohhhh ok, so there is like a valve with a connecting passageway to the tensioner that mates up to the opening for the oil filter. I get it now. NICE. Thanks SharksFan and Air1Jpg for the help lol

I just couldn't visualize a connecting passageway lol sorry.

So with that, Air1, you don't think what my mechanic said is correct? Or his theory rather?

I'll search some more but what is the consensus on the knocking noise on these trucks? I read that someone took it to the dealer and the replaced a tensioner and some guide or something and the noise is gone.

And another thing . . . could it actually/possibly hurt the engine to put an additive in the oil?

 

Some filters do not have the check valve, so if you are using one that does't, or one that has a cardboard filter that can fail, you would have this noise. use a Motocraft filter.

 

Yes, it can hurt an engine to run additives depending on what they are. The additive package the oil manufacturer installs in their oil is all that is needed. If you are worried about it, follow the severe duty maintenance schedule. If you do any short trips, stop and go, or city driving, you are considered severe duty anyways as far as Ford is concerned.

 

hmm interesting. I didnt even THINK to look at what filter was used. I will definitely only use motorcraft stuff as I always have on all my Ford trucks
thanks guys