Hello, please don’t hit me because I opened the 25 thousandth engine oil fred, but I need your help, or I would like to hear your opinion on the subject. It is about a Jeep CJ7 Bj. 1977 with the 232ci (3.8L) 6 Zyl. AMC engine. The vehicle has about 80,000km at the hump and was now after about 6 years “stand around in the hall” revived by me. The machine runs quite well. I changed the engine oil before the first start and filled in a Total Rubia 15W40 engine oil. Is a very normal engine oil with which you can do nothing wrong with an old engine in my opinion. Always check the oil level nicely, engine should be healthy from the point of view of the oil consumption. What I noticed, however, is that if it is at operating temperature the hydro plunger (I know that it has some) begin to clack. In the cold state after the start the noise is not to be heard. Have already combed through several sides and it is on the topic “crack And now I need your help. 1. If anyone can tell me which oil is perhaps more suitable for this machine, they could not find anything on US sites to do so. 2. Furthermore, I would like to have opinions on oil additives such as the LiquiMolly hydro impact charge, and if this could “suppress” the hydros. 3. I also read that one could wash and clean the engine. 3. I also read that one can wash and clean the engine. s, about half a liter of diesel can be filled, and the engine should run 2min on stand gas, then make oil change. In principle, I think, it is about cleaning the hydros or the engine, and I would like to have your opinion on it now! mfg mr_vollgas