celbii

iTrader: (2)

What weight would you reccomend for a almost stock T2?

dwb87

iTrader: (22)

I run Castrol GTX 20W-50

Although my car isn't stock... I am very sure you can run 20W-50 with no problems. Also, if you're going to use synthetic oil... go with Royal Purple. I have heard good things.

NMJ87T2

iTrader: (8)

There is a chart for what weight you should run dependant upon climate in the FAQ I believe. I run royal purple 20w50 in mine year round, but I live in a hot climate.

celbii

iTrader: (2)

Thanks, i was thinking 20w50 but wanted to make sure.

rx7 FC TII

iTrader: (3)

for the summer its suggested that you run 20-50 and for winter run 10-30.

ericgrau

iTrader: (1)

No no no... what crazy part of the world do you live in, that has heat waves and blizzards? Oh wait... you're in Alabama and the O.P.'s in Oklohoma. So maybe you do. I'm a naive Californian, so I just assume you guys cow tip all day and try not to die from the weather :P. But otherwise, ever since the invention of multi-weight oils (you know, with 2 numbers), there has been no need to change your viscosity in the winter. 10w30 for Alaska to 80F, 20w50 for 20F to Death Valley. So either will work. For some reason Mazdatrix recommends 10w30 in N/A and 20w50 in turbo. Maybe b/c 20w50 coats & seals against the higher pressure better, while 10w30 flows & lubricates better. So I'd go with 20w50 just for the heck of it, unless your winters dip below 20F.

Turbos have more of a reason to go synthetic because of the greater heat and pressures the oil has to put up with. All the synthetics listed in the FAQ are crazy good, though I lean towards Royal Purple myself.

But the main problem here, IMO, is an excessive focus on oil when it won't make much of a difference. The real problems you migh run into are overheating, detonation, poor compression from wear and/or carbon buildup and a spun bearing from no oil or oil breakdown. Carefully maintain the cooling system and turbo components, tune conservatively, use quality detergent gas & oil, rev the engine regularly, always properly tighten (but w/o overtightening) your oil drain plug, check for and quickly address oil/coolant leaks, use synthetic oil on track days, etc.

Dak

I don't have a turbo but I've been running 10w40 for the last 9 months or so. Used to run 20w50 but switched. If you want to run a thinner oil than 20w50 I prefer 10w40 over 10w30 in the Rx7. 20w50 will be fine though. In the heat in OK. it would be better than 10w30. I think I may have gained 1 or 2 mpg since I switched.

Ice_Wolf

This is exactly what I do too. If you look in your owner's manual, it has a chart showing which weight oils Mazda recommends depending on temperatures.

Eric, you do realize that some people in the states live in places that have climate changes? Where I live (Iowa), we get into the high 90's during the summer, and as far down as -20 degrees in the winter. So yes, there is a point of running a thicker oil during the warmer months and a thinner one during the colder ones. I'm not saying we have heat waves, but we definitely have blizzards.

RX7KENN

for the summer its suggested that you run 20-50 and for winter run 10-30.

I live in canada, it gets up to 40 degrees celcious and which is neear to 100-110 feirenheit, Something around there neway. in summer.

and -30 celcious in the winter. so thats like -101932847239843 feirenheit.

HAHA dont mind my spelling k thanks.

and yeh i run 20-50 and 10-30

rx7 FC TII

iTrader: (3)

well if you can consider 104 a heat wave then yes.

doesnt everyone go cow tippin ??? what about muud ridin??