Hey guys,

I recently switched over to Amsoil in my GS400. I switched because we started using it in our industrial gear boxes. Right off the the bat I noticed that my mileage jumped to around 22-23mpg. The only mods I have are a K&N drop in and a Carson exhaust. On a recent road trip I got around 24mpg cruising at 75mph. I am going to run a bottle of Amsoil PI through and see if that will help any more. I have always though it got really good mileage considering the sticker says 19mpg on the highway. My daily driving consists of 50/50 highway/city.

What are you guys getting mileage wise?

 

i get 20-21. hitting boost at least once a day.

 

Car is stock. Only use Chevron, no fuel additives. 80% Highway, 20% City. MPG 20-23.

 

17 in the city, 23-24 on the highway.

 

18-22 depends on how I hit the

 

I get about 20 combined...but got damn near 30 driving my car back to Mn from Pa.

2000GS4

 

15-16 around town and around 20-21 on the highway. My mods are killing my mpg. ;(

 

gas mileage? lol.....I don't even bother to check anymore...hurts my feelings too much every time I put gas in it. I do know however I can get from North Phoenix to Las Vegas on 3/4 tank....about 12 gallons...at good cruising speeds of 70-75 mph.

 

Wow i only average like 20mpg driving my GS300!
sounds like its time for a tuneup

 

They say that the gas mileage is almost identical. Don't feel bad, i want to get a 400/430 myself but i have too much money invested in my 300.

 

You should still do it IMHO. All your parts can be transferred easily to the GS4. It's just that it would be a PITA especially if you didn't bother to keep your stock parts.

 

no power mods on the gs400 here and i use amsoil as well. amsoil is in everything on the car and we get about 23-24mpg. but the wife has a lead foot so when she drives the car all week we get like 17mpg.

 

I'm envious of the mileage you all are getting. I am at HALF the mileage of most of you. I don't have a heavy foot, yes the car is tuned, and yet my mileage sucks eggs. Oh well, at least if I run out of gas and I'm on the side of the road, when someone helps me out, they can look at the pretty engine that's fuel starved!!

 

20 combined. Normal driving

 

20 more or less