I want to do some mods on the exhaust in an effort to increase exhaust flow to return better gas mileage. Some reads show an increase in noise level and or horrible drone at interstate speeds . What has been suggested from a reputable Toyota repair shop is a Cat Back Stainless Borla muffler and rear resonator delete . I did speak to the shop about mods in general and how frequently one ends up with diminished return! He cautioned that the LX570 was very sensitive about changing the factory intake IE Shorthorn with cone style filter . He said if doing more offload to migrate to a snorkel but only if doing more offloading in effort to mitigate dust and engine compartment warm air.

Has anyone gone down this path and what were your results please.

 

The oem air cleaner gets cold air from inside the passenger side front fender. Cone filters in the engine compartment take in warmer air. I've yet to see independent testing showing a HP gain with an under the hood air intake.

Given it's a 3+ ton truck with a 5.7L engine, were you aware of typical mpg numbers prior to purchase??

 

Thanks for the quick reply Hankinid!! I knew you would be able to chime in as you are so helpful on this Forum !
I was very aware of the MPG estimates and real world users in my area with their mpg's.
As a new owner I thought I would explore mod options that make sense or finally "don't Fix what's not broke"

Cheers Mike

 

Cheers and a good New Year back to you.

 

...that I can't really argue...Exhaust and air intake changes

 

But a thread this morning noting that blocking 75% of the intake opening (pre-filter) still allows enough air for the engine. here.

I'm also seeing that the AFE filter box uses an oiled filter...as one poster wrote, "I wouldn't touch it with a 10-foot pole"...having tried a K&N only once in the Dodge diesel horse hauler, I'd agree...it's a major PITA to clean and refill, and too much oil can destroy MSF sensors.

 

OP, don't waste your money putting premium in if you are. That's probably $15 a tank.

We are deciding on used LX vs GX purchase and other than it being more of a beast, the fact that you can use regular is a significant factor that is swaying me more and more toward the LX. Identical engine as the Tundra that takes regular. It's much more controversial in the GX because of the higher compression vs the 4 Runner V8.

I wouldn't want to drive a truck for life with the computer retarding timing....and it won't in an LX.

 

...nor will it in a Land Cruiser.

Be aware that the Regular/Premium discussion here usually results in a massive urination contest and a thread that leads to nowhere.

Imo, what's more important than octane numbers is the percentage or complete lack of ethanol. Ymmv, but we go for non-ethanol for both the LX and the Cruiser. Around here, it comes from Sinclair and Chevron, and you can find it in 89, 90, and 91 octane. Reason for the non-ethanol is simply much better life for rubber materials that come in contact with gasoline. Add to that both trucks are definitely NOT designed for greater than E10 gasoline, regardless of octane. OT but another reason is that between chainsaws, weed and brush cutters, and other power equipment it's FAR better to use non-ethanol v. ethanol gas to avoid fuel lines turning in to rubber goo.

 

Right. I think the Land Cruiser asks for regular? Premium "required" in the LX is just for brand image.

Lol oh I know. I'm not going to argue though, if people want to flush their money down the toilet and get suckered by Lexus PR they can knock themselves out.

This is a hot topic, too, but it doesn't worry me. Automakers are well aware that 95% of gas contains ethanol and they engineer accordingly. A Lexus truck would be the last vehicle I would ever worry about that with anything...they're indestructible.