i have a 88 rx7 TII whats a good kinda oil to put 10w30? is it ok to put sinthetic oil or am i better off without it. what will get my longer engine life too

 

do a search for synthetic oil and you will find more info than you ever wanted to know 10w30 is fine, unless you are in an always cold or ways hot enviroment.

 

Jealous of 86-88 mechanical MOP.
Dump the OMP, run synthetic and premix.

Actually any oil that is changed frequently(2-3k miles) and topped off regularly(every fillup) is good enough. Just match the weather(read the owners or service manual) to your oil weight.

Concerning synthetic, mostly hearsay. Will guinea pig my car next year after winter storage's hibernation.

 

i dont think you want to run sunthetic. I have read tons of stuff on this. rotories burn some of the oil, and synthetics dont burn well for some reason. All i have ever used in castrol gtx 20w50. good stuff. know alot of rotary people that use it.

 

THIS is more than you ever wanted to know about motor oil...

http://fc3s-pro.com/TECH/MODS/ENGINE/OIL/oilfaq.html

 

haha omg amur that is the **** man..... I personally run 20w50 about to dump that and run a thinner oil just for oil seal purposes....

 

well not thinner but different kind

 

I run Castrol 10/30 Syn Blend. Just that Syn Blends are so much more inexpensive compared to straight synthetic and our engines are designed to use oil. Interesting enough, I did read somewhere that it isn't good to do you own blend by doing your own mixing of a bottle of synthetic with a bottle of regular. Something about using different detergents when making synblend.

The idea that synthetics don't burn as well as regular oil is from the very early days of synthetics. Except for with breaking in a new engine, most of your main research types (ie Racing Beat, Mazdatrix, etc) actually endorse synthetics.

 

That is true about the old syns. they didn't burn very well. They left a residue. the new ones don't though. Infact Mobile 1, Redline, and Amsoil, all leave less residue than natual oil. And they don't have any crap inthem like the natuale oil.
Natural oil has stuff that time and nature put tere. It has no pourpose with our needs.
Synthetics however don't have much of anything that doen't involve lubrication. It doen't break down like natural oil does. It holds its film strength better than natural. and it burns better. this is exactly what our motors need.
20w50 is overkill for a street motor that doesn't haul. If you are racing it great, but a regular street motor only needs 5w30 thru 10w40. thin for cold, thick for hot.
Comsumer reports can back everything up on this

 

is it ok to use 10w40 instead of 10w30?

 

10W40 is ***.

From the link I posted earlier...

Use at your own risk.

 

I mainly use sugar water in the winter and 10w-40 in the summer! For christ sakes. 10w-40, 20w-50, whatever just change the ****. At ever 2-3k a change; it doesn't matter that much! In my '86's manual it only has charts, and doesn't recommend a certain weight. I use 10w-40 haven't had a problem, ever! Then again with the massive power of an N/A rotary I'm not to worried. For a turbo such as yours I'd use 20w-50, but don't over analize it. Please

 

tried to find the sight that had good info on this but lost it.but I agree with rx74prez this article said synthetic oils do not burn as well as reg oil and the rotary engine does need to burn oil with the combustion process.

 

I love sunthetic oils but, not in my rotarys. I use it in every thing from 14,000 rpm supper bikes to my mower. Rotarys have ben running perfect with out sunthetic oil from the start. If it's not broke don't fix it.

 

Now, do you recommend sugar water made from white cane sugar, or brown sugar? Also, what concentrations are we talking about here?

 

I prefer Nutrasweet and I occasionally flush the system with Equal.