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luv
04-24-2008, 11:50 AM
Getting ready for my first oil change on the Lexus IS300. I've always used Castrol 5w30 on past cars, but they've all been 4 cyl. This is a 6 cyl with 90K miles. Suggestions? Thanks!

HemiEd
04-24-2008, 11:52 AM
You don't need to change the oil in a Lexus, they are above that.

luv
04-24-2008, 11:52 AM
Just to clarify, I bought the car used. I have not waited 90,000 miles to do an oil change.

Frosty
04-24-2008, 11:53 AM
Go with what your manual suggests.

Lzen
04-24-2008, 11:54 AM
You don't need to change the oil in a Lexus, they are above that.

:LOL:

Lzen
04-24-2008, 11:54 AM
Don't forget to check the muffler bearing while you're at it.

DaFace
04-24-2008, 11:54 AM
Go with what your manual suggests.

Yep. Assuming you've got the manual, it should have a recommendation for the type of oil to use, possibly with specific recommendations based on the types of driving you plan to be doing (in terms of weather, frequency, etc.).

StcChief
04-24-2008, 11:55 AM
Go synthetic for what they recommend.

MIAdragon
04-24-2008, 11:57 AM
mobile 1 synthetic

luv
04-24-2008, 11:57 AM
Yep. Assuming you've got the manual, it should have a recommendation for the type of oil to use, possibly with specific recommendations based on the types of driving you plan to be doing (in terms of weather, frequency, etc.).

I do. I had asked one of the guys that works for me who drives them what he used, and he said 20w40 or something like that. I just thought it sounded weird. I'll check my manual.

Chief Wiggum
04-24-2008, 11:57 AM
There are much better people that can answer this on the planet than me, but I would stick with synthetic - it doesn't need to be changed as much and holds up better over time. Generally, I think people will put a lighter weight oil in their cars in the summer (due to the heat) and a heavier weighted oil in the winter, although I could have that backwards.

In the end, this post probably isn't much help but it is one more post on my way to not being a n00b. Good luck.

luv
04-24-2008, 11:57 AM
Go synthetic for what they recommend.

What does that do?

DaFace
04-24-2008, 11:59 AM
There's a chance it may even have a recommendation on your oil cap.

Lzen
04-24-2008, 12:00 PM
I do. I had asked one of the guys that works for me who drives them what he used, and he said 20w40 or something like that. I just thought it sounded weird. I'll check my manual.

FYI: Many cars now also have the oil weight listed on the oil cap.

Lzen
04-24-2008, 12:00 PM
DaFace, you're quicker than I.

Chief Wiggum
04-24-2008, 12:00 PM
What does that do?
Synthetic is a type of oil (think regular oil on HGH). It will last longer. When he says what the manual recommends is the weight of the oil (basically its viscosity).

DaFace
04-24-2008, 12:00 PM
FYI: Many cars now also have the oil weight listed on the oil cap.

Ha! Beat ya to it.

MIAdragon
04-24-2008, 12:01 PM
you should run 10W-30

Frosty
04-24-2008, 12:04 PM
I do. I had asked one of the guys that works for me who drives them what he used, and he said 20w40 or something like that. I just thought it sounded weird. I'll check my manual.

Go with what the manual says, not some dipshit that thinks he is smarter than Lexus.:rolleyes:

luv
04-24-2008, 12:46 PM
Well, I'm not seeing anything in the manual, so I guess I'll check the cap.

luv
04-24-2008, 12:47 PM
Well, I'm not seeing anything in the manual, so I guess I'll check the cap.

Never mind. Found it. 5w30.

Castrol makes synthetic, right?

Brock
04-24-2008, 12:50 PM
Be sure and use jack stands while you're under the car.

Radar Chief
04-24-2008, 12:50 PM
I can almost guarantee you that 20W/40 is not the right oil for your car.

Radar Chief
04-24-2008, 12:51 PM
Never mind. Found it. 5w30.

Castrol makes synthetic, right?

Yes.

Phobia
04-24-2008, 12:57 PM
Never mind. Found it. 5w30.

Castrol makes synthetic, right?

I'll bet it says 710 on the cap. You should check the cap. I'd trust the cap over the manual.

stlchiefs
04-24-2008, 01:01 PM
Without knowing what the previous owner used I would definitely go w/ synthetic. If they used synthetic and you don't you're really going to jack things up from my understanding. You can always switch to synthetic, but you can't switch back. If I'm wrong someone call me on this.

chiefforlife
04-24-2008, 01:08 PM
Without knowing what the previous owner used I would definitely go w/ synthetic. If they used synthetic and you don't you're really going to jack things up from my understanding. You can always switch to synthetic, but you can't switch back. If I'm wrong someone call me on this.

That is a myth that has been out there for quite some time.

Castrol or Valvoline are both good oils. You should definitely use 5w30, petroleum is fine if you change it every 3000 miles. Synthetic last longer and I usually recommend 5000.

chiefforlife
04-24-2008, 01:10 PM
On another note, Your timing belt is due at 90K also. You should replace the water pump also at this time.