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Fuel Consumption / Gas Mileage - How bad SHOULD it be on a used GS430 motor?

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Old 06-27-14, 10:09 PM   #31
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try using top tier gas and use energy conserving oil and maybe even 5w-20 but a synthetic blend. bad news: I need a new battery!
The dealer changes the oil for me and I only use shell gas on all my vehicles. I can notice the difference on my turbo vehicle
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Old 06-28-14, 08:37 AM   #32
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Yeah, the lexus being NA isn't as hard on oil as your turbo so your lex can use energy conserving semi-synthetic 5w-20 or 5w-20 or even the cooler 0w-30s and 0w-20s with no loss of coverage while your turbo will need a hearty 5w-40 or more frequent changes. heck, you might even want to swap out your lex early depending on how hard they are on oil.
I don't think I worded my comment correctly.
My turbo teg I change the oil in it and I use valvoline 10w-30 oil in it when it's ready for synthetic. I just rebuilt the motor because I dropped a valve in the previous, I was revving to high. In my lex, gs 430 and is300, I have the dealer change those. Mainly because it cost the same for me to do it myself and they dispose the oil as well versus me storing it.
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Old 06-30-14, 09:20 AM   #33
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Spark plugs, throttle body cleaning and MAF cleaning helps a lot. If you are doing a seafoam flush do it before you change the spark plugs. I average around 24mpg but I baby it and driving is 60% hwy 40% city.
can I change the plugs myself? and which plugs do you guys recommend?
I'm have MAF cleaner and how is the throttle body cleaned on this car?
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Old 06-30-14, 09:33 AM   #34
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try using top tier gas and use energy conserving oil and maybe even 5w-20 but a synthetic blend. bad news: I need a new battery!
new battery is good news. your car will live longer once it receives one.
Don't do what I did. Drove my Audi A4 with its OEM battery to the point where if I stopped for 1 min and didn't turn the car back on within that minute, the battery would need a boost.

This in turn hurt my alternator. When I lock / unlock my doors you can see the door step lights and even headlamps being drained of energy / voltage.

Do the battery change sooner than later.
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Old 07-01-14, 12:51 PM   #35
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can I change the plugs myself? and which plugs do you guys recommend?
I'm have MAF cleaner and how is the throttle body cleaned on this car?
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Originally Posted by striderg3 View Post
new battery is good news. your car will live longer once it receives one.
Don't do what I did. Drove my Audi A4 with its OEM battery to the point where if I stopped for 1 min and didn't turn the car back on within that minute, the battery would need a boost.

This in turn hurt my alternator. When I lock / unlock my doors you can see the door step lights and even headlamps being drained of energy / voltage.

Do the battery change sooner than later.
Plugs? Use OEM. I haven't done MAF or TB cleaning yet. I haven't had issues with the car so I'm not messing with it lol.

Also, completely agreed on the battery. Once you kill your batt, your alt is all the juice that's given to the car, making it prematurely die.
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Old 06-04-15, 08:44 AM   #36
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I have a 2006 GS430. I do 85% City driving and in hot Texas summers with AC on all the time. I usually get around 13.5 mpg running around town.

I've done all maintenance recently except for throttle body & MAF cleaning.
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Old 06-05-15, 07:41 AM   #37
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Imagine this is the highest octane they sell to us chumps in Canada.
Well you don't need higher octane, but here in Toronto you can easily find 94 at a lot of Petro Canada stations if that kind of thing makes you feel better.
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Old 06-05-15, 07:41 AM
 
 
 
 
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