1990 Rx7 N/A coolant and oil recommendations.
1990 Rx7 N/A coolant and oil recommendations.
Rotary Freak
Joined: Jul 2016
Posts: 1,838
Likes: 597
From: Beeton, Ontario
This topic has been covered repeatedly. The search function should yield plenty of answers.
Short answer is the best off the shelf coolant is just the standard yellow/green stuff. Mix only with distilled water.
I like to run 70/30 water to coolant in the summer and 50/50 in the winter, but 50/50 should be fine all year round. Just my opinion.
Regarding the oil, there is still debate about that. The thickness you should run depends on the ambient temperature. Here in Canada, I like 20W50 summer and 10W30 winter. Elsewhere you might be able to get away with 20W50 all year round.
The synthetic vs conventional debate has been covered too, but modern synthetics are pretty good so if you feel it is worth the extra money that is really up to you. I like plain old Castrol GTX, as it is cheap and readily available.
Short answer is the best off the shelf coolant is just the standard yellow/green stuff. Mix only with distilled water.
I like to run 70/30 water to coolant in the summer and 50/50 in the winter, but 50/50 should be fine all year round. Just my opinion.
Regarding the oil, there is still debate about that. The thickness you should run depends on the ambient temperature. Here in Canada, I like 20W50 summer and 10W30 winter. Elsewhere you might be able to get away with 20W50 all year round.
The synthetic vs conventional debate has been covered too, but modern synthetics are pretty good so if you feel it is worth the extra money that is really up to you. I like plain old Castrol GTX, as it is cheap and readily available.
Thread Starter
Junior Member
Joined: Sep 2017
Posts: 11
Likes: 1
From: Alabama
thanks!!!
This topic has been covered repeatedly. The search function should yield plenty of answers.
Short answer is the best off the shelf coolant is just the standard yellow/green stuff. Mix only with distilled water.
I like to run 70/30 water to coolant in the summer and 50/50 in the winter, but 50/50 should be fine all year round. Just my opinion.
Regarding the oil, there is still debate about that. The thickness you should run depends on the ambient temperature. Here in Canada, I like 20W50 summer and 10W30 winter. Elsewhere you might be able to get away with 20W50 all year round.
The synthetic vs conventional debate has been covered too, but modern synthetics are pretty good so if you feel it is worth the extra money that is really up to you. I like plain old Castrol GTX, as it is cheap and readily available.
Short answer is the best off the shelf coolant is just the standard yellow/green stuff. Mix only with distilled water.
I like to run 70/30 water to coolant in the summer and 50/50 in the winter, but 50/50 should be fine all year round. Just my opinion.
Regarding the oil, there is still debate about that. The thickness you should run depends on the ambient temperature. Here in Canada, I like 20W50 summer and 10W30 winter. Elsewhere you might be able to get away with 20W50 all year round.
The synthetic vs conventional debate has been covered too, but modern synthetics are pretty good so if you feel it is worth the extra money that is really up to you. I like plain old Castrol GTX, as it is cheap and readily available.
Joined: Aug 2011
Posts: 3,078
Likes: 42
From: Cambridge, Minnesota
What Wonder Bread said.
Green pure coolant concentrate from Wal-Mart mixed 50:50 with distilled water, also at Wal-Mart. Cheapest way to do it, can almost make two gallons of mixed coolant for the price of one pre-mixed coolant.
I'm the same, 20w-50 summer and 10w-30 winter oil weights. Since you're in Alabama you could probably run 20w-50 all year just fine. Conventional if you still have the OMP installed, can run synthetic if you have it removed or blocked off and run premix.
Green pure coolant concentrate from Wal-Mart mixed 50:50 with distilled water, also at Wal-Mart. Cheapest way to do it, can almost make two gallons of mixed coolant for the price of one pre-mixed coolant.
I'm the same, 20w-50 summer and 10w-30 winter oil weights. Since you're in Alabama you could probably run 20w-50 all year just fine. Conventional if you still have the OMP installed, can run synthetic if you have it removed or blocked off and run premix.
Information Regurgitator
Joined: Feb 2001
Posts: 1,994
Likes: 208
From: Sparta TN. United States
I like others just run the green coolant and distilled water. For the oil I have been running 10w40.20w50 gets pretty thick in the cold and here in TN we see some cold spells. I could run 20w50 in summer but I just run the 10w40 year round. Owners manual lists it as fine but Like 20w50 it's not as easy to find anymore as most new cars are using 5w and 0w base oils now.
Joined: Aug 2011
Posts: 3,078
Likes: 42
From: Cambridge, Minnesota
Walmart sells 5 qt. containers of Castrol GTX in both 10w/30 and 20w/50 for $17.
Oddly, they also sell quart bottles for like $6 apiece and I always wonder who the hell buys it...
Oddly, they also sell quart bottles for like $6 apiece and I always wonder who the hell buys it...
Trending Topics
Joined: Aug 2011
Posts: 3,078
Likes: 42
From: Cambridge, Minnesota
Although, I have a K2500 Chevy Suburban for a tow vehicle with the 8.1L V8 Vortec engine and that thing drinks oil like a rotary. Actually, it's probably worse now that I think of it...probably uses 1 quart of oil every thousand miles. So sometimes I will just buy a single quart container to keep in the truck since it's easier than keeping a 5 quart bottle in there.