Amsoil 5W-30 or Mobil truck and suv 5w-40

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Apr 18, 2004
I'm not trying to start competition between brands with this thread. Was just curious about what some of the members thought about my plan. I plan on changing oil in my toyota Highlander this weekend. Car has always had dino 5w-30 and fairly extended drains (about 7,500 miles). I plan to switch over to full synthetic. Will be going on vacation soon and truck will be filled to capacity with luggage, etc. I have 5 Qts. of Amsoil 5W-30 left over. But was thinking of using Mobil1 5W-40 (truck and suv) oil for this change and leave it in the rest of the summer. I would then change and use amsoil for winter. Is this being to anal? Should I just use the amsoil now instead of buying the mobil1?
Either Amsoil or Mobil 1 will work fine in this engine, but I'd run a 5w-30 or even the Amsoil Series 2000, 0w-30. This engine runs very hot and if you use a thicker oil, it will simply run that much hotter. I have half a dozen local customers with 3.0L, Toyota V-6's and all of them run either 0w-30 or 5w-30 year round in the South. It's not necessary to run a 5w-40 or 10w-40, simply because you are loading up the vehicle. Tooslick
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