what brand of oil and what weight should i use? 87 TII motor stock turbo with dp and exhaust

normal weather i suggest castrol gtx 20w50





with that said....what u northern guys suggest for winter....

sounds good, thanx



Loi

Doesn't really matter, but determing factor is weather. Colder the weather, the thicker oil is needed, up here in MN I use a 10W-30.

royal purple 20w50 (that was going to be my next oil for my T2)

I am using Amsoil 20w50 Racing Synthetic I have my OMP pulled out and I run Amsoil Premix too. I just got my hands on som eof Pettits premix and I am giving that a try.



I used to run Castrol GTX 20W50 its good stuff just make sure to change your oil every 3K miles no more.

i was at 2000 when i wrecked mine.... and i was gonna change it reall soon like maybe another 10 miles

actually in colder weather, thinner oil is called for

huh?

yea i always heard otherwise

in the colder weather the oil has a harder time getting circualted.



if you read any manual it will tell you in colder weather

to use a thinner oil, and in warmer weather to use a thicker oil



It even says it in the RX-7 owners manual for christs sakes, lol

yeah, I use 20w50 then switch to 10w40 in the winter (like I drive the bitch anyhow)

now Im really curious, WHO did you hear otherwise from? lol

LMAO, probably some amish guy https://www.nopistons.com/forums/pub...#>/biggrin.png



kevin.

Robs right, its obviously easy to mix up.

Yup, hotter=thicker, colder=thinner.



That's because oil thins when it gets hot. Ever try heating up cold oil in a pan. Cold oil rolls around slower, that's because it's still thick, but after it gets hot, it rolls around much easier, that's because it's thinner.



So to promote circulation, you will need thinner oil in winter because it's too hard to circulate thick oil around the engine when it's so damn cold. It will take a much longer time to get thick oil to the places it needs to be than thin oil.



With that said, 10W30 is best for winter.



I think you should use synthetic, they tend to flow much better than regular dino, and for those that think "no, no, synthetic don't burn in rotaries" that's old news. Modern synthetics burn just fine in rotaries (all burn less than 500F), and leave a much lower ash content than dino when burnt. Just don't ge the cheapies. Get quality synthetics like: Royal Purple, Amsoil, Redline, and NEO.



I personally prefer Amsoil, it's killer stuff.

https://www.nopistons.com/forums/pub...IR#>/blink.png i figured you just typed your response wrong earlier, but the other guys

confused me

What about Mobil 1?? I've always loved that stuff and always put it in my MR2. Always 12 quarts of 15-50 i believe.

True. oil gets thinker the colder it gets. If you have 20w 50 in the engine and it's cold out, you killing the engine. I would just shoot the engine with a 12 gauge, at least that way you can have some fun killing it.

If we wanted to get technical, the Workshop Manual states...



-20 - 32 degrees Farenheit= 5W-30

-10 - 90 degrees Farenheit= 10W - 30

-10 and up = 10W - 40, 10W - 50 (if it goes higher than 70 degrees)

20 and up = 20W - 40, 20W - 50



I use 20-50 personally. And is Mobil 1 considered "cheapy" oil? I love synthethic, but I hate spending 40 bucks every 3K mi, it gets a bit pricey.

I think Mobil 1 is good ****. I use it in my other cars. Some swear that the only good synthetics are the ones that only race shops carry or you have to get online like Redline, Amsoil, etc. I don't know. Can't beat $18.88 for 5 quarts of Mobil 1 at WALMART!

yea you guyz are right... whats funny is my Shop Teacher told me that... he must have been drunk when he told us lol

one of the benefits of synthetic oil is you can leave it in the engine

for longer.



At 3,000 miles you should change the filter, and top the oil off, there is no

need to drain the oil and change it. Your throwing your money away. But the filter

itself still needs to be changed.



I did this on Town Cars in the early 90s, and those cars seen some abuse

with the odometers showing

100,000

200,000

300,000+ miles on them

So... Mobil 1, good or bad?

I don't know man, you'll get all kinds of opinions on this. I think Mobil 1 is good yet I only use Castrol dino oil in my 7's just because I've been doing it for years. Another question would be why do the majority of RX-7 owners prefer Castrol over other dino oils? Is there some study saying its better?

I think its because Mazda uses Castrol from the factory.