Motorcraft filter and 5W-30 Royal Purple in both Rangers' engines. Royal Purple ATF for both transmissions, and Royal Purple gear lube for all the axles.
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This is a common misconception about synthetic oils. You can switch to synthetic any time you want, no matter how old your engine is. Nothing bad will happen. I'm switching over all my vehicles and lawn equipment to synthetic, one by one, including my 1994 Explorer with 143k miles and my 1992 Accord with 131k miles. I've already switched both vehicles and they are running great, with no bad side effects, just as I suspected. What are you so afraid of, i.e. what exactly do you think will happen if you put synthetic in your engine?yea , i usually like to run Napa Gold Filters , which are made by Wix , but oil , i currently run castoral , but my dad lives by quaker state , and my stepdad buys whatever is on sale at autozone , i really like shell , and they just came out with the synthetic Rotella T 5w-40 , but i am afraid of what it may do to my engine , since the engine has 100k on it and the shell oil is full synthetic
i dont know about now but quaker state was designed yrs ago to gunk up to preserve aluminum blocks, and in turn was great for stopping up oil pumps. the synthetics may not do this but the mineral oils did, and when you changed the oil you had it coming out in glops like oatmeal and milk, i dont like that in my engine. i seen it do it one time when somebody had their oil changed, and my half brother worked at an oil shop in town and every car that had the quaker state oil change that had it in there b4 did this when he drained the oil out. sorry but quaker state isnt high on my list of oil choices, they may have changed the formula and it doesnt do it anymore. i remember seeing it when i was kid (about 8 or 9), just stayed away from it ever since.
i run mobil 1 full syntheitc in all my vehicles except the beetle and change out every 5000. the beetle is diesel, it gets a change every 10000 on rotella t synthetic.
on my ranger i switched to mobil 1 synthetic ata bout 150000, when i stopped delivering pizza(runs up the miles real quick). just make sure you let it drip out every bit you can of the old stuff and fill up with the good stuff. i use the mobil one filter with it also. done me good for over 50000 so i would recomend the mobil one. i use mobil one synthetic in my rear and tranny too. doin real good all around.
... the axle was sumerged once
couldn't tell from your avatar...you wont have any trouble switching to synthetic. the motor will love the stuff, go for it!!!