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Old 12-23-08, 11:13 PM   #1
MELODY7
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Default Synthetic or Conventional Oil

I just hit 10,000 miles on my '08 GS 350 and I would like to know what type of oil Lexus usually puts in my vehicle or what should I use or what is required? I also wanted to know if we get a free 10,000 miles check up my Lexus. Thanks for the help.
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Old 12-24-08, 03:59 AM   #2
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I just got my GS350 in November and I was told that the 5000 mile service was free after that I have to pay.
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Old 12-24-08, 07:14 AM   #3
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For the love of god use synthetic, thats what lexus uses, hence the oil change intervals are longer compared to the regular 3k. Lexus offers the first complimentary oil change for all new CPO and new lexus's.
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Old 12-24-08, 07:45 AM   #4
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For the love of god use synthetic, thats what lexus uses, hence the oil change intervals are longer compared to the regular 3k. Lexus offers the first complimentary oil change for all new CPO and new lexus's.
All Lexus and Toyotas come with conventional oil from the factory. No where in Lexus or Toyota documentation in the FSM's or your owners manual states that the use of synthetics are required. The 5k service intervals are achieved with conventional oil, NOT synthetic. If this was the case, you would see this printed in all documentation, including the engine oil cap of your Lexus.
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Old 12-24-08, 07:53 AM   #5
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so my isf has regular oil too? my friend asked the dealer when he got his 5000 service done with isf, they said its synthetic?
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All Lexus and Toyotas come with conventional oil from the factory. No where in Lexus or Toyota documentation in the FSM's or your owners manual states that the use of synthetics are required. The 5k service intervals are achieved with conventional oil, NOT synthetic. If this was the case, you would see this printed in all documentation, including the engine oil cap of your Lexus.
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Old 12-24-08, 09:44 AM   #6
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i talked to the service rep and they said they use mobile1 synthetic blend.
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Old 12-24-08, 12:49 PM   #7
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My dealer uses Shell regular oil. At 10,000 miles I changed the oil and am using (and will continue to use) Valvoline full synthetic.
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Old 12-24-08, 10:32 PM   #8
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Originally Posted by flipside909 View Post
All Lexus and Toyotas come with conventional oil from the factory. No where in Lexus or Toyota documentation in the FSM's or your owners manual states that the use of synthetics are required. The 5k service intervals are achieved with conventional oil, NOT synthetic. If this was the case, you would see this printed in all documentation, including the engine oil cap of your Lexus.
My dealership uses synthetic And youre right that it doesnt state it in the manuals, but that doesnt mean that dealerships wont use synthetic oil versus regular oil, especially in a Lexus. My gf's CL's 500 doesnt need synthetic either, nor does it state it in the manual, but Fletcher Jones still uses synthetic as well. Perhaps it is just up to the dealerships.
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Old 12-24-08, 10:33 PM   #9
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Even tho the manual doesn't state anything on using synthetic...i still would recommend you to use synthetic. It will make a big different in the long run if you keep your car for awhile. When you hit 50K+ ... your engine will still run smooth like the way it use to be.
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Old 12-24-08, 10:38 PM   #10
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My dealership uses synthetic
Dealerships only offer synthetics if you ask for it otherwise they will put the regular conventional oil in.
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Old 12-24-08, 10:43 PM   #11
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Even tho the manual doesn't state anything on using synthetic...i still would recommend you to use synthetic. It will make a big different in the long run if you keep your car for awhile. When you hit 50K+ ... your engine will still run smooth like the way it use to be.
Did you know those Toyota trucks that have run well over 100, 200, 300, 500k and 1 million miles have achieved this using regular conventional motor oil? A regular maintenance schedule is the key here.

I've run many of my own Toyotas including my previous 04 IS300 over the 100k mark without the use of synthetics. They still run as smooth, strong and are leak free since the day I first bought them.
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Old 12-24-08, 10:45 PM   #12
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I heard once you go synthetics you can't go back to conventional oil.. not sure if its true but I use synthetic anyways...
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Old 12-24-08, 10:56 PM   #13
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Did you know those Toyota trucks that have run well over 100, 200, 300, 500k and 1 million miles have achieved this using regular conventional motor oil? A regular maintenance schedule is the key here.

I've run many of my own Toyotas including my previous 04 IS300 over the 100k mark without the use of synthetics. They still run as smooth, strong and are leak free since the day I first bought them.
I'm pretty sure conventional oil is good also as long as you regularly maintenance your vehicle like you stated. I bought a brand new 1994 Toyota Supra back than and didn't use synthetic and after about 30K miles on the car...i notice the car engine wasn't as smooth as the day i bought it. Got rid of that supra and got me a brand new 1995 TwinTurbo Supra...use synthetic after 5k miles...the car ran smooth till 40k miles after i sold to SW. I'm sure alot of you seen this car on youtube... I wanted to buy it back afterward but SW sold to somebody else and that person total it in 2 weeks. Anyways....i believe conventional oil is good but i think syntetic is the way to go.
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Old 12-24-08, 11:00 PM   #14
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Dang Thomas... how many rides do you have? You had the supra and then you just bought 2 GS too? Give me a piece of that pie! haha
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Old 12-24-08, 11:07 PM   #15
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I'm pretty sure conventional oil is good also as long as you regularly maintenance your vehicle like you stated. I bought a brand new 1994 Toyota Supra back than and didn't use synthetic and after about 30K miles on the car...i notice the car engine wasn't as smooth as the day i bought it.
Nice Supra. But for those 30k miles of owning that 94, when did you start doing mods to your 2JZ-GTE.
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Old 12-24-08, 11:07 PM
 
 
 
 
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2008, 250, 350, back, blend, change, conventional, full, lexus, ls430, oil, regular, synthetic, temperature, video

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