Hi guys, I have to change oil to my eg6 with engine b18c rebuilt with Wiseco pistons, the rest is all stock. Now the engine is 5000km and has always been used with Motul 300V 10W40 oil. Reading and listening to various tips, not yet understood what is the best solution and I look for your advice here.

The car is only used on weekends for pleasure trips, and 6/7 times a year I participate in trackday. Environmental temperatures of use from 5 degrees to 30/32. The engine has a 19-row Mocal oil radiator and even on the track the oil temperature never exceeds 110 degrees in summer.

I think I have provided all the information for your noble advice

 

I've read this several times now, and i guess I'm looking for a question to help assist you on, if any. What is your basic question, here?

 

Which oil for b18 for road/track use?

 

This is not a valid question. Road = road race/circuit or street/daily use . What do you mean by "track"? What type of racing age toy trying to involve yourself with?

There are many different oils to us. Best ones need a high ZDDP (zinc) content. Brands NOT to use are Mobil 1 Synthetic, in any weight.

You can use anything from Castrol Edge, to Pennzoil, to Brad Penn, etc.

We can't read minds. But this is the last attempt to humor you. There are literally 15years of archives here you can plow through to understand your needs. But there is no BEST he, only what is best for you.

 

What's wrong with it?

 

I had written it in the opening topic: The car is only used on weekends for pleasure trips, and 6/7 times a year I participate in trackday.

Now i use Motul 300V 10x40

 

Why are you using 10W40?

Pick any modern name brand synthetic oil in 0W or 5W 30 and call it a day.....

 

thanks for the advice, I would like to understand why; is not the gradation for my climate too low? Here in Italy many people use and recommend 15w50 and I would like to understand the motivations of such advice.

 

You'll find more information here through their forums.

Bob Is The Oil Guy

 

The engine was designed around 5W30(which is suitable for all climates/temperatures)

If the engine is modified/raced, then use a synthetic version of 5W30. Or a racing only version. There is no valid reason to change the weight at this point.

The majority of people who run thicker oil, do so out of shear ignorance and misunderstanding of Tribology.

 

I think that thicker oil is used because in racing applications, especially forced induction an oil-cooled turbo can increase oil temps quite a bit.

Would really like to know why Mobil 1 should not be used, as I was just about to put in their 0w-50 racing oil....

 

Thicker is not always better, as some oils actually burn off MORE as cover temperatures increase. That's why many circuit cars actually use a 0w oil because the car almost never runs comes in racing conditions. (See Enos Racing Oils as an example). Bearing clearances tend to be optimzed towards those thinner oils

Mobile Synthetic tends to run almost too thin. So thin, that I've seen oil weeping from between the head gasket and block (by the VTEC solenoid). Then when changed to something else, like a Castrol or Brad Penn, that weeping actually goes away. I kid you not.

 

 

I tend to go with what's best for the turbo. As something that rotates 20,000 times faster than the engine itself takes precedent.

Valvoline VR1 "blue" 10w30 is just fine

 

I recall 40 weight oil being more popular over on ek9.org vs on the north american forums I have read...

 

That's more based upon availability than popularity. A 40w is just not that in demand in the U.S. for off-the-shelf oils.

The specialty brands like Brad Penn, Eneos, , VR-1 and Rotella T5 & T6 oils are more in demand for 40w in the U.S.

 

Interesting, under what conditions does this happen?

 

Normal operating conditions. No racing, nothing fancy

 

I have been using Mobil 1 in all of my cars for 15+ years now. They all do leak, but they're all old cars too

Definitely going to try switching to Valvoline or Castrol and see if it makes a difference. Ordered VR1 for the CRX.

 

Right.

Well my post above specifically addresses the reason for this fallacy....

There is no reason other than personal preference or experience.

Ive found that Mobil-1 tends to burn/flash off much more quicker than other synthetics. I change my oil every 7k. Have for the last 15 years. With mobile 1 I was always 1 quart to 1.5 quarts low at the end of my OCI. With other oils(specifically Pennzoil Platinum) I usually lost no more than .5-.75 quarts. So I dont use Mobil-1

However it is factory fill in many high horsepower production vehicles.