Gernby

iTrader: (1)

Acording to lobuxracer (and others), our transmission fluid can't realistically be changed (ever).

EDIT: I was assuming you were talking about a 2IS. I have no idea about the other Lexus's's.

Lexmex

I think you may also have that World Standard WS fluid.

The RX300 uses a Type-IV as the stock fluid, but I have never heard of a single issue from using the Amsoil ATF in the tranny in our vehicles, in fact I have seen nothing but positive comments. I change mine out at least once a year (because I race my little RX).

GSteg

iTrader: (15)

So was the report good/bad/average?

Double thread backfire if it turns out to be good/average

Technique

Well, the engineers comments on the report says it's good, so I guess the oil is good and it was totally fine to wait 3 years...

BUT, I want to get an "analysis" of the numbers/TBN from the knowledgeable people on the forum, because I might be mistaken...

socalJD

IMHO, your UOA showed 2 interesting things. Assuming the factory fill was dino oil, contrary to popular opinions - dino oil *can* be used for longer OCIs, especially since your TBN was decent. But since your oil had such high mineral content, it's probably prudent to change out the factory fill at the recommended interval, just to purge the break-in debris from the motor. Not sure which oil your mechanic used, but it would be interesting to see what your next UOA looks like on the jag - knowing you, it'll be 5 yrs and 15k miles from now . . .

Gernby

iTrader: (1)

My guess is that Blackstone will say that any results are "as expected" when it is a break-in oil that is changed within the recommended mileage. The only thing that was reported as "strong" was the TBN. That doesn't necessarily mean that the engine is in as good of shape as it would be if you changed the oil each year.

Technique

socal and gernby: I agree with both of you... I think the moral of this story is that oil can definitely go longer than most people think...

As far as the 2nd oil change on the jag, well, I am probably going to turn the car in at the end of the lease at the end of the summer, but if I keep it, well, I wouldn't change the oil till 20k mile at least, which is probably like 10 years from now :-)

I'll post a similar thread when I change the oil in my IS350... That will be at least 12 months, and close to 15k miles on the break-in oil... The following change after that will probably be another 12 months and the odo will be close to 30k...

Of course, I'll have the analysis+TBN done

Gernby

iTrader: (1)

It doesn't sound like you really agreed with me. My opinion was that just because Blackstone said the results were as the expected, I don't think your engine is in as good of shape as if you changed it earlier. If you look at the metals in your oil, some of them are WAY higher than mine were.

lobuxracer

iTrader: (2)

I am really surprised the TBN was so high. You could have gone even longer. Wow!

DASHOCKER

iTrader: (2)

The factory fill for Jaguar, Landrover is Castrol SLX sold in the UK.

http://www.castrol.com/castrol/produ...tentId=7008962

Technique

I do agree with you... I know that if I had changed the oil every year, there would have been a little less metal in the oil... So yes, my engine would have been in better shape...

However, I think the difference is almost trivial.. Meaning... How much better shape would my engine have been in? The answer is "who knows"? How do you measure such things? Really, I think maybe we're talking a few percent difference at best...

So I do agree that it would have helped a little, but the end result might be engine failure at 300,000 miles instead of 280,000 miles... or something like that...

Technique

I know, I should have waited the full 10k miles, but I will probably turn the car in right around that time so I wouldn't have changed it... But something about "exactly 3 years" had a nice ring to it...

Anyway, I hope this has been a good experiment... I think the final verdict of this episode of mythbusters is that regular dino oil, in low mileage environments that are considered "severe driving", can go several years without being changed...

Myth busted!

Gernby

iTrader: (1)

Thanks for getting the test donw!