There were several brands of oil that were claiming to make pure synthetic oil but if fact were using petro basestocks. There was a lawsuit brought up but I don't think it was successful. So there are some synthetic oils out there that are NOT 100% pure synthetic.

Koz

 

hey guys here is the oil change rules for lexus

for you to keep warranty on your vehicle the oil needs to be changed 6 months- 5000 miles with a 2000 miles grace period.

do not put synt. oil in your is till the vehicle reaches at least 10k miles or you will have a nasty leak on the seals.. that will cost you more money

the syn. oil DOESNT help the performance or the life expectancy of the engine.

IF you put syn oil you can not wait till 10-15k per oil change. that will reject the warranty.

Most oil changes in lexus dealers cost from 39.99-59.99 that will include free car wash ( no detail).

The dealership DOESNOT have to provide you a loaner vehicle because its not a warranty work. Unless you have an insider or they have enough loaners to give it to you.

So i'll say instead of paying 20$ at walmart or toyota and do it every 3000k or putting unneccessary expensice syn. oil just spend 40-50$ and get you a car wash two three times a year.

Remember you are driving one of the most reliable vehicle on the road. All they ask is to change oil on time.. just do it..

 

Well, I guess we can close this thread...

Javier

 

ROFL!!!!!

 

I will be changing my oil at 1K and 3K with petro based oil to rinse the engine of break-in debris and then I will go to Amsoil TSO 0w-30 (unless Amsoil comes out with a 0w-20). After the first change (at 3K) to synthetic and a UOA (used oil analysis) at 13K (10K on the syn. or 1 year) I will be changing the oil once a year.

Changing to synthetic before 10K causing leaks is ridiculous! The ONLY way the manufacture can void the warranty is if they can PROVE the oil or lack of changing it caused a failure. This is NOT happening! 100% pure synthetic is far superior to petroleum based oil and WILL provide better performance (a little more HP and MPG), protection and definitely will add to the life expectancy of the engine. The biggest difference is how long you can safely use the oil before changing it.

Koz

 

I would really like to know where this insight comes from. Are you just regurgitating info that was regurgitated to you? It kind of sounds like it. I did a UOA on my break-in oil at my 5K oil change, and everything came back clean. I will be doing another UOA on my next oild change (10K) in 200 miles. I switched to Mobil 1 at 5K miles, and haven't had any "oil leaks". Switching to synthetic oil before 10K causing leaks IS rediculous, because it doesn't cause leaks. On some cars, it does increase oil consumption by switching early, but not leaks. I haven't had that problem with this car, but I experienced it on my S2000 for a few thousand miles.

 

Looks like Koz was replying to 931timur, not stating that changing before 10k will cause a leak?

-Brian

 

I do not regurgitate. I try to state facts and try to help provide good advice about subjects that I know about. I know about motor oil. If there is something I wrote that you feel is not accurate please fell free to give your option.

As far as changing to synthetic oil before 10K miles not causing leaks, I am glad you agree with me. As far as your statement that changing it before 10K miles will cause more consumption, I have never seen any proof of that (talk about regurgitating).

Why would you have a UOA done on break-in oil? If you plan to change your oil every 5K why would you waste your money on Mobil 1? Also, do not waste your money on UOAs if you are going to change Mobil 1 every 5K miles. You may want to see what is doing with the oil (with 5K miles) and engine (with 10K miles) one time, but after that, you would be wasting your money. I would recommend using maybe Mobil 5000 or the 7500 blend with your change intervals. If you plan on using Mobil 1, I recommend their 0w-20. There are many benefits.

Koz

 

Are there any potential problems with changing synthetic to regular oil after just 5k miles? My dealership did the free oil change at 5k, and after getting my oil changed with regualr oil at 10k I learned that the dealership uses synthetic on all 5k services!? So in essence I had synthetic from 5k-10k and now switched back to regular.

 

I'm hoping that you are being sarcastic about me agreeing with your opinion about synthetic causing leaks, since I totally disagree. You seem to have switched your terminology from "leaks" to "consumption" just so you can say we agree. Most people (knowledgeable or not) would describe a "leaK" as a ruptured seal or gasket, and "consumption" as something that is getting burned during combustion. I do know from experience that some new engines will consume (via combustion) synthetic oil at a higher rate before break-in is completed than conventional oil, but I've never experienced a single leaky seal or gasket on a low mileage car from any type of oil.

Your concern about my UOA's is confusing. What do you care? I got the UOA on my break-in oil for the forum's benefit. Questions and concerns about going the full OCI on break-in oil are common, and I wanted to offer some results. I will continue to do UOA's until the engine is fully broken in (with synthetic) so that I can adjust my OCI to suit my needs. If I can go 7500 or 10,000, I will adjust to that. I would much rather pay for a few UOA's than 5 or 6 extra oil changes, especially since I do my own oil changes. My time is worth a LOT more to me than $25 for a UOA.

 

That's not a problem. Synthetic and conventional are compatible. A slightly more significant issue is changing brands, due to the different additive packages.

 

So is it safe to assume Lexus uses the same brand, whether it be synthetic or regular?

 

Let me clarify my posts. 931timur stated that "do not put synt. oil in your is till the vehicle reaches at least 10k miles or you will have a nasty leak on the seals.. that will cost you more money." I completely disagree, thus my statement "Changing to synthetic before 10K causing leaks is ridiculous!" I think you misunderstood my post. What I have experienced with most newer Toyota engines is that they are very easy on motor oil and you should be able to get a year out of a change with a premium filter and synthetic oil. You should be able to safely go to the OEM recommended 5K mile OCI using just about any oil on the market.

Koz

 

You won't have any problems on a new low mileage engine.

Toyota recommends not going back and forth with synthetic motor oil. I personally have not seen any negative effects in doing so. What I have seen on some older engines, that only used petroleum oil for many miles/years (approx 100K+), could experience some leaks or filtration problems. Premium synthetic oils use better additive packages that can dissolve oil build up and cause these problems. I do not recommend changing to synthetic on old high mileage engines that only used petroleum oil. It's not worth the possible problems.

Koz

 

No, but it isn't really that big of a deal to swap brands.