Hi, there. Finally retired my '89 lude with about 210k miles. Now i get this new baby from local dealer. I worry about warrenty issue so that I probably won't do the OC myself. Toyota asks 5kmiles or 6 months as OC interval. I'm thinking to use M1 5w30. However read many negative posts about M1 5w30 recently. My question is: are there any other 5w30 oils do not thin out quickly and last as long as 5k miles/6months ? Or i just go for M1 5w30 since weather is always warm here. Thanks.