Gas and Tire pressure

Guys,

The other day I pulled up at the gas station I pumped Super (91). However, since I got the truck I have been using Regular (87). Changing to Super I hope I don’t cause a problem. Which type of gas is recommended for our 4th Gen ?

The second item I wanted to discuss is tire pressure. One day I decided to check the tire pressure. Using a digital gauge that I use for all my cars I got a reading of 50PSI per tire. I checked the door’s label and the recommended PSI is 32, now that seems a bit low. I dropped the tire pressure to 40 PSI but I’m still thinking that’s a bit high. What tyre pressure are y’all running?

Thank you all,

 

87 and 32.

 

Using higher octane than the recommended 87 wont cause any issues. Some claim to feel a benefit to using higher, others don't.

I’ve always gone with the door tire pressure and get good tire life. Why do you feel it is incorrect? Also worth checking with tire manufacturer.

 

Use the tire pressure on the sticker for the tire size on the sticker​

 

the sticker on the door jamb?

 

Yup. As long as the tire is the same size as listed on the sticker and you check when the tire is cold you'll be fine.

 

87/33

 

I have a 24 TRD OR premium and the door jam says 30psi

 

No owners manual? It's a good read.

Not sure what you base 'low' on. It's certainly the correct starting point.

If you need to refine based on weight you've added or something, Google the term 'chalk test' and that will let you refine more.

 

Not every gauge is accurate, the TPMS readings in the dash are pretty close, usually within 2 psi.

32psi is cold, so warm its about 35psi during the day.

 

They get transported at a high psi, and normally the dealer will lower it to the correct setting on delivery. Which, per the door jamb, should be 30-32. As far as octane, we’ve been debating that here along with oil change intervals since before man discovered fire. Toyota says 87 is perfectly fine btw. Good luck, and don’t forget to share a few pics.

 

I've always ran tires a LITTLE harder than the door sticker. Around 35ish unless I'm loaded heavy. Then maybe 40. No more. Different tires from factory might work better with a bit more, you just have to experiment.

87 octane should be fine but higher octane won't hurt anything. Be aware, if you live or travel in high attitude areas they sell 85 or 86 Octane as regular. Mid-grade is 87 or 88 octane and premium is usually 91 octane. DO NOT use anything less than 87 octane even where 85 is sold as regular.

SOME vehicles will see a bit better performance with higher octane fuel even though the owners manual doesn't address it. In my experience there are no gains in fuel mileage, maybe a fraction of 1 mpg, certainly not enough to offset the higher costs. But when towing or loaded heavy mid-grade or premium might give a little power boost and help the engine and transmission run cooler.

Most, if not all of the other manufacturers who have been making turbocharged gas engines do recommend premium when towing and 87 octane for general driving. I haven't seen a 4th gen owner's manual and don't know what they say. But if premium fuel gives more power in all other turbo engines, chances are good it will in the Tacoma too.

It won't cost much to keep detailed records and give premium fuel a try for a few tanks to see if it makes any difference. If not, then stop using it.

 

87 is just fine, but you will likely see some (while minimal) gains with a higher octane. I've been using 93 in my truck recently and the butt dyno says it has slightly improved, along with an ever so slight bump in MPG.

I don't have the factory tires, but I run 34psi cold in my Cooper Road+Trail's. Seems to be the combo on these tires. As they heat up they do reach up to 39-40, but that's 95°+ days.

 

87 and 36

Search "gas" and you will find several threads about 1,000 pages of the debate between regular and premium. It should keep you busy for a while.

 

Your owner's manual has good guidance too.

At a year and 11,000+ miles plus one tire rotation, the Toyota guidance is near perfect. Measuring across the tires my wear is consistent plus the ride, handling and traction are good.

What's most important is the top tier spec for your fuel. The only time anything for fuel approached need was high altitude mountain travel with near full capacity loads. High octane boosts MPG but that is not cost effective most of the time. These are not sports cars and I don't drive like an ass clown so standard grade octane is usually just fine.