I’ve been browsing a lot here but couldn’t find the answer that I need. This is for a SC300 and an RX300 and both cars do not consume or leak any oil. The manual calls for 5W-30 API SH Energy Conserving II or SJ Energy Conserving multigrade engine oil or ILSAC multigrade engine oil. I already know that I should go with 5W-30 oil but I am not sure about the importance of TYPE II or type III or SJ and SH. I’m currently running Castrol GTX. Here is what I found from the oil websites whose products that I would like to use but I really want to try Pennzoil Yellow Bottle because it is will received here in BITOG. Castrol GTX - SAE 5W-30 exceeds API Service SM, SL SJ and SH as well as exceeding all the requirements of ILSAC FG-3/GF-2 for API Certified Gasoline Engine Oils nd meets Energy Conseving Standards. Pennzoil Yellow Bottle – SAE 5W-30 API Service SM, ILSAC GF-4- Meets or exceeds API SM Service Classification (all grades). Exceeds ILSAC GF-4, GF 3 and GF 2 requirements. Valvoline Maxlife – SAE 5W-30. MaxLife is formulated with extra anti-wear additives to exceed the engine protection requirements of ILSAC GF-3 and GF-4, and API SL/SM standards and is safe for use in new and rebuilt engines, and will not void new car warranties. Thanks in advance.