I was wondering if anyone on here uses Idemitsu synthetic rotary motor oil on there cars, im considering ordering some, but before i shell out +40$ for 5 qts I wanted to know if anyone here knows if its worth the dent in the wallet.

 

I would not use a racing oil in a street car. It is not API certified b/c it does not have the additive package that you would want.

Stick with a good snthetic such as royal purple or redline, cheaper and will protect your engine better.

 

Is this true?

 

listen to Brillo. He talks to God...

 

then again this thread is from a year ago eeee

 

2 years ago.

 

Actually, 1 year and 360 days ago.

 

dear lord time flys.

But really, so 10w30 Idemitsu = no good for street car?

 

not necessary for street car. I know many people use their Pre-Mix on our 8's, not sure about the engine oil

 

not necessary or BAD for a street car? Question pending I have 12qts of this in my garage.

 

What are you, a Vulcan?

 

but their premix though, not bad right? i wish i can pick up some locally =(

 

Just order a case on-line from one of the Idemitsu distrubutors listed on their Website. Shipped right to your door, 12 quarts. Lasts me a year.

 

There is no right answer for it.

In order to get API rating, you have to meet some of their requirements, one thing to remember is that, it does not mean the more you have, the easier u will be able to get thru. lets say Certain additives are consider harmful to the earth and you should not have too much in the oil. if you have too much, you fail. Does that mean its bad for the engine ? noooo

Not to mention, it cost money to get the API test, if you know your product works and you have a group of loyal customer, why bother with the test?

So yes You can use Idemitsu oil for a street car. maybe I should be the first one to take that spot.

 

12 Quarts of RP ship to ur doors 80 bux

Idemitsu for about 100

 

ressurection, i'm about to just buy a ton of oil, and need to know which i SHOULD get.

i've decided on synthetc. now what? royal purple or idemitsu?

 

http://www.royalpurple.com/motor-oil.html

In Texas I would probably use 10w-40.

 

Use Red Line, Idemitsu, or Royal Purple.

 

https://www.rx8club.com/showpost.php...7&postcount=87

 

This would seem to contradict the idea the oil is not meeting API requirements or else they've changed the formulation since. And 'SM' oil is what Mazda specifies except in the USA & Canada (ILSAC only)(ILSAC, API SL or SM in other than USA & Canada)

 

Racing oils will kill your cat. Plain and simple. If you want a racing oil but would like to spend less Valvoline has a lineup from street legal VR1 to the stuff they use in NASCAR.

http://www.valvoline.com/pages/produ...asp?product=50
http://www.valvoline.com/pages/produ...asp?product=94
http://www.valvoline.com/pages/produ...asp?product=95

 

Can you add some detail to that...i.e., what is it, scientifically speaking, about Idemitsu Racing oil that will "kill your CAT"?

 

He wasn't referring to the fact that a wrong additive package wasn't going to contain an adequate amount of protection for the street. Far from it.

I refuse to use Valvoline in a rotary on the grounds that it has the root word "valve" in the name!

 

Taking the information in this post, couldn't it be great to add maybe 1 Quart of Idemitsu Racing oil to your regular addition of Royal Purple or Redline?

 

savedsol brough up a good question, so I asked Idemitsu about the CAT issue today, they replied promptly....

Your idea of mixing crossed my mind as well, might be another option. Beside when you change/filter oil, you only really change 3.1 qts of 5.6 qts total in the system anyway, so you theoretically never get all the original oil out, short of a complete engine rebuild