My girlfriend has 1998 Toyota Tacoma 2.4 automatic 220,000, no maintenance history available In the owner manual it says dexron III but it was discontinued so now it atf IV What is better for…

Nokmanee

My girlfriend has 1998 Toyota Tacoma 2.4 automatic 220,000, no maintenance history available In the owner manual it says dexron III but it was discontinued so now it atf IV What is better for transmission fluid, oem atf IV (conventional) or synthetic generic trans fluid Scotty always says oem which makes senses but he also said in one video that you always want to have synthetic trans fluid What are your thoughts guys?