Too Engine Builder's
 

I am Think about changing the Oil in my new RS with only 120 miles on it.

would you leave it in until 600? I have the Time I have the oil. I was planning to run some Valvoline MXL 10-30 Synthetic ACEA A3/B3/B4 BMW LL01/98 VW502.00/505.00, MB229.3/229.1 API SL

Or would you run a non-synthetic (Turbo Approved) Dino oil for about 600 miles first.

Some people think that it's good to break it in on regular 10W30 but we build, start, and run our race engines on Mobil 1. I don't think it's necessary to switch to regular oil. I broke mine in on Mobil 1 and have no issues at all with the motor except that it seems to make higher than average power. {thumbup}

I can say the same for mine, higher than average power, zero oil consumption, and perfect compression on all cylinders. This is with 20k miles, about 17k of which were modded miles. I changed my mobil one out at 500, then at 1500, then 2500, and I've done it every 2500 since then. And I've been using Mobil 1 oil filters since the beginning too, but lets not make this into another oil filter thread.

- Steve

Thanks,



I think I will do 150, 1000, 2500, then every 2500 thereafter. The Valvoline meets the ACEA A3 spec and has a much higher TBN 9.0. Mobil 1 does not meet these specs in the 10w-30. should be a tad thicker.

Run petroleum based oil for 1000-1200 mi. run the car hard...seat those rings....you should NEVER break in a motor on synthetic oil.....ask any professional engine builder...

BS. Like I said, I do it on every race motor we build, and every street car I own. I make more than avg power every time on every car. No smoke, no problems. Please list the "Pro Engine Builders" you have personally recieved this information from and the times that you personally have experienced problems breaking in a motor on synthetic. Thanks.

this is why I could to you for advise

Hendrick Motorsports, Porsche Motorsports, American Honda (built CART engines when CART was a good series, and now IRL engines) Hasselgren Racing Engines (built 95% of all Toyota Atlantic engines over the last 10+ years), Sunbelt Racing Engines (builds the majority of BMW engines for World Callenge Touring), Rebello Rcaing (World Challenge builder), Prototype technology Group (World Challenge GT), BMW Motorsports, AMG, Andial.....

Although BMW M engines, Mercedes AMG and Porsche come with Mobil 1, these motors are hand assembled and run on the dyno with petroleum based oil before being installed. The build quality is S**T on the Evo engine....

You can use synthetic, but it is not recommended...good luck.

Show me where all of these builders state that they require their engines to be built and broken in on regular oil. Show proof. All you did was list names. What good is that? That you can google? Please, man.

BTW, more than just the BMW, Merc, Porsche motors come with Mobil 1 besides the EVO.....

And show proof that their engines are broken in on regular and then shipped with synthetic. Prove to me that it's not something you just read on the web like so much else posted in car forums. Thanks.

edit: Also, please show me proof that the EVO is not also broken in on regular and shipped with synthetic. It can go both ways.

I dont know about his list of names but Ive talked to local engine builders that have said the same thing. Ive been building cars for 16 years and have followed the same rule of thumb of dino oil for break in. Its not a subject you have to get all upset about but Im not going to call the local guys around here to make statements for you.

Stupid comments like that just ruin your credabilty.

Why is it I have personally seen 4g motors pulled apart with over 100k miles on them and you can still see the cross hatching honing marks with perfect compression? I guess its the crappy quality :rolleyes: .

If your gonna make stupid comments, at least have some info to back it up.

Heres a good reason not to use dino oil to break in your car. It WILL void your warantee. And another is that the tollerences are so close on piston rings from the factory that the rings don't need "set-in" in the traditional sense.

Oh I am not at all upset. I am just asking for proof. That's not being mad. That's something that needs to be done more often on the Internet.

BTW, pretty much every motor in a new car today has been run at the factory. There are some things I know for a fact based on my current position with (insert major automotive manufacturer here) in addition to my family's various positions in the automotive industry.

If I'm upset about anything, it's random spewing of "facts."

Really? Next time you have your head off of a car take a look at the casting "slag" left in the ports, look at the valves.....the seats....last 4G63E head I saw, the valve seats were overhanging into the port.....I looked as if the engine was just slapped together....that comment was far from ruining my credibilty. It's the truth.
Question...why is it that the rings do not need to seat? Never heard that one before. A week later I had Toyota head from an Elise, valves were very nice, clean ports....STOCK. It was soooo much nicer than the EVO head, I was pretty suprised.

I am not trying to start a war or prove anything, just passing along some info that I have picked up from high profile people in the racing industry.

I have been in the professional racing industry for 15+ years. I am not trying to start a war here... A very close friend of mine who has been designing racing engines for over 30 years, he ran BMW's F1 engine program in the 80's (1.5L 1500+ HP) and consults for them currently including the new roadgoing 12 cyl. He designed the Infiniti IRL engine and consults for quite a few professional racing teams, both in the US and Europe. And yes, I agree Mobil 1 is great oil. I really don't feel that I need to prove anything here...I don't agree with passing along BS, so I don't do it. When I am told how a manufacturer runs their engines with petro oil and then fills with synthetic by someone who works internally with them and has seen it why should I think differently?

You really think that Mits runs the engines on a dyno then drains the petro oil and fills with Mobil 1.....that would be awesome if that was true. I'll look into that answer for you.

Have a great weekend!

Just one more small point I would like to point out.

Question 1: How often are race engines rebuilt? Once a week or more?

Question 2: How often are street car engines rebuilt? Hopefully never if the manufacturer gets it right.

Let's make it simple. What kind of car do you drive? Street or race? What sticker does your street car have right on the oil cap? Don't F* with that.

Philosophies may differ, and I can accept that. But sometimes you just have to realize that we are not all driving F1 cars. I just had this conversation the other day. How amusing.