When i bought my Jeep (4.0L) there was no ticking. After having it a month i changed the oil and used QuakerState 10-30. Right after the oil change a lifter started ticking. I added some STP oil treatment and the ticking stopped went away. I heard that some oils dont have enough Zinc in them and that will cause ticking (and STP treatment does have Zinc).
So whats the best oil to use? What brand has the Zinc I need?
Diesel Truck oil. Mobil TDT and Shell Rotella oil are some of those. Mobil 1 High mileage also has added zinc, mine loves it. This might be a bigger problem than Oil though because you shouldnt be noticing a huge difference. Somebody may have added something to shut it up so they could sell it quick. My sisters i6 runs on bottom of the food chain penzoil and my WJ used to as well until I owned it. Zinc is better for the engine but its not there to quiet down tick.
98 XJ Sport | i6 | AW4 | 231 | Stone White | Agate Leather
SOLD 01 WJ Ltd | i6 | QT2 | Moog HD steering | Tow Package | Boston Acoustics Audio | RB1 | Lou's Catback | Stone White |
I had a loud lifter tick in my newly rebuilt 4.0 it was really bad, to the point I was ready to replace the cam and lifters. I switched to mobile 1 high mileage and the tick is about 95% better. Hardly noticeable, I would switch your oil.
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Oil treatments are garbage (for the most part). If your oil isn't good enough, get better oil. Adding to it won't fix anything. Mobil1 HM is great oil. You may want to do an engine flush (Auto-RX, Amsoil, LubroMoly are good) to help clean the oil passages and provide better flow to the lifters. And as compcrasher said, the zinc is there to prevent wear, not reduce ticking. Higher viscosity oils (such as M1HM 10w-30) will help with that.