I would like to tell everyone and in no way am I connected with schaeffers oil. I am just an ordinary guy that fully owns his cars and wants to get maximun life out of them. I was a diehard royal purple fan for the longest time, The reason for that is because I have a dodge stealth 95 dohc which has a notorious lifter tick issue as well as it has alot of bottem end noise running 10w30 oil. My 02 dodge caravan also had alot of tapping upon startup, Anyway I have switched from conventional name brand oil to royal purple which is great oil, It has cut the lifter tick issue with my dodge stealth in half as well as the tick on my van. However it was still present somwhat on both engines. I switched to schaffers oil and the noise has disappeared! Not only has my engines started to run silent but they actually have a bit more pep and alittle more MPG! The stealth sounds like the day it was built and the van is silent as well, Not only that is cost less than Royal purple, I use the 7000 schaeffers oil. This oil is amazing! I hope this oil really catches on cause it does what it says! It puts royal purple to shame. My dodge stealth with 127k which had some blowby is now totally sealed back up. I have used many different name brand oils on this engine, Mobil 1, Penz, Quaker, Valvo, Royal, Redline and nothing has been better than schaeffers. Like I said I am in no way connect with this oil company I just want to thank them for putting out such a great product and I hope they will never change there formula ever! This will be the only oil I will ever use in any of my vehicles. Engine only though as I like to stick with the transmission spec fluid. I encourage anyone that has not used this oil to please give it a try, It is almost clear out of the bottle with a slight green hue to it. 2 oil changes so far and my stealth sounds brand new and has increased oil pressure! It's hard to find but worth the find. I found it on there web site and very few places sell it, Usually small small businesses sell it and they themselfs are diehard over it. I can see why. Thank you for letting me share.