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texassadist t1_jbet24s wrote

Reply to comment by tsnara in My 2004 4Runner with over 320k miles by stratomaster82

Wth is low octane top tier? Like 87 w/ Techron?

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sinnayre t1_jbf7k0h wrote

Pretty much.

Top tier brands are listed at toptiergas.com. For modern vehicles, most cars will call for 87, but check your owners manual for exact octane level. Higher octane just means it takes more compression to detonate, which is only important in specific applications like turbos and some higher end luxury cars. It’s important to prevent knocking.

Just don’t be like a buddy of mine and put 87 in a BMW that called for 91 and wonder why the engine was knocking.

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Mabepossibly t1_jc994rm wrote

Yes. Essentially there is a difference between name brand gas Mobil, Valero, Citco, etc and the Cumberland Farms or Wawa gas.

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