TeeKaa

I have 4K miles on my 2003 TL-S and want to switch to syn oil. But I have a friend who says I should wait until 15K to make sure the engine/rings/seals, etc. get seated properly before the switch.

What do you think about this? Is it advantageous to wait for complete breakin?

edgalang

I hate spreading rumors, but I was told 10k. Naturally I waited until 15k so I could do the 7.5k oil change intervals without having to worry about weird integers. If I had to do it all over again, I'd switch over at 7.5k (which is your next change, if you got an oil change @ 3.75k)


P.S.

Something to keep in mind...Mercedes and other high perf cars come with Mobil-1 Synthetic straight from the factory.

TeeKaa

Next change? I haven't done my 1st yet since the dealer told me I should just do it at 7.5K. All my other cars have been on the 3K program.

fsttyms1

it definatly wont hurt to wait! you want all the seals to break in proplerly.
and for the cars that come with it, alot of times the manufacturer will add a additive to help with the break in

RecklessTL

def make the switch - as soon as i bought my car , that was the first thing i did and it runs strong

jean

You can make the switch anytime now..
Stick with Mobil 1 or Royal Purple, if you have more cash to spare try Redline or Amsoil.
Oh and stay way fromFram filters.
J

SK2003TypeS

FWIW, I switched to Mobil 1 5w30 @ 4111 miles

r10apple

I went to Mobile 1 at 7,500 miles and then went to Royal Purple at 22,500 and have never looked back...No hiccups, either...

Mr Zipps

I switched at 8k. But I changed my oil at 2, 4, 6 then 8k to synthetic. I started with Mobil 1 Syn w/ Mobil Filter but am now running Valvoline SuperSyn w/ Mobil Filter.

TeeKaa

I'm unfamiliar with Royal Purple, where is this available. Which of these syn oil manufacturers put out a 5-20 or does a 5-30 or 10-30 make a difference?

I plan on using the Kragen oil filter
No just kidding, I'll be using either K&N or Mobil filters

Thanks for your help!

fahoumh

I made the switch to Mobil 1 5w30 at my 15K oil change and I've had no problems