OK to switch to this oil on this engine->
OK to switch to this oil on this engine->
Is it OK to swtich to Quaker State High Performance Synthetic 20W-50 on this engine:
1992 305 TPI,
80,500 original miles,
Perfect running condition,
Oil is still clear/honey colored every change,
Burns so clean, there is no carbon on 1,000 mile old exhaust pipes!
I've heard it's not a smart idea to switch to synthetic on high milage engines but I believe mine is an exception due to it's prestine condition. I thinking at this point heat and wear on the bearings are my worst enimy right now and this should keep it cooler in there. I also tend to drive it hard every now and then too. The 20W-50 is because of the milage otherwise I would just use 10W-30.
Thanks.
------------------
1992 GTA (226 made), 1 of only 18 "Dk. Jade Gray Met. Primar" 92 GTA's, Window Sticker, 305 TPI, 700R4 4-Speed, T-Tops, Grey Leather, every option except rear disk brakes (Oh well, makes it 1 of a kind), and CD.
Current Mods: 80 Series Dual Outlet Flowmaster & TPIS Air Foil, THAT'S IT! 98% STOCK AND DAMN PROUD OF IT!!
Future Mods: Subframe Connectors, OE Replacement K&N.
"If it ain't broke, fix it til it is!"
[This message has been edited by 92GTA (edited July 24, 2000).]
1992 305 TPI,
80,500 original miles,
Perfect running condition,
Oil is still clear/honey colored every change,
Burns so clean, there is no carbon on 1,000 mile old exhaust pipes!
I've heard it's not a smart idea to switch to synthetic on high milage engines but I believe mine is an exception due to it's prestine condition. I thinking at this point heat and wear on the bearings are my worst enimy right now and this should keep it cooler in there. I also tend to drive it hard every now and then too. The 20W-50 is because of the milage otherwise I would just use 10W-30.
Thanks.
------------------
1992 GTA (226 made), 1 of only 18 "Dk. Jade Gray Met. Primar" 92 GTA's, Window Sticker, 305 TPI, 700R4 4-Speed, T-Tops, Grey Leather, every option except rear disk brakes (Oh well, makes it 1 of a kind), and CD.
Current Mods: 80 Series Dual Outlet Flowmaster & TPIS Air Foil, THAT'S IT! 98% STOCK AND DAMN PROUD OF IT!!
Future Mods: Subframe Connectors, OE Replacement K&N.
"If it ain't broke, fix it til it is!"
[This message has been edited by 92GTA (edited July 24, 2000).]
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
IMHO it is not a mistake to switch to synthetic ever, except sometimes for purely economic reasons.
And that is a very low mileage engine actually, I would not recommend using oil that thick. If it were mine I would use 10W-30. For comparison I have a 78 El Camino 305 with 334,000 on the original motor and a 74 Caprice convertible 454 with 265,000 on its, I use straight 30 (not synthetic - they both leak too much and I don't want to spread money all over the pavement that way)in both of them.
------------------
"So many Mustangs, so little time..."
And that is a very low mileage engine actually, I would not recommend using oil that thick. If it were mine I would use 10W-30. For comparison I have a 78 El Camino 305 with 334,000 on the original motor and a 74 Caprice convertible 454 with 265,000 on its, I use straight 30 (not synthetic - they both leak too much and I don't want to spread money all over the pavement that way)in both of them.
------------------
"So many Mustangs, so little time..."
Member
Joined: Apr 2000
Posts: 398
Likes: 0
From: Salisbury NC
Car: 87 Monte Carlo SS
Engine: 89 IROC 350 TPI
Transmission: 700R4 rebuilt w/TCI kit
Axle/Gears: 9" from 57 ranchero unsure gears.
I use castrol syntec 5-50 works great always maintaning 30-60 psi.
forgot to mention I have 100+ grand miles on mine as well.
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'87 Monte Carlo SS,with '89 IROC 350,700 trans, blew up 3.73 posi stuck with crappy 2.73's neeed gears! hooker headers, flow's 2 1/2" exhaust true dualls
[This message has been edited by monte-ss (edited July 24, 2000).]
forgot to mention I have 100+ grand miles on mine as well.
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'87 Monte Carlo SS,with '89 IROC 350,700 trans, blew up 3.73 posi stuck with crappy 2.73's neeed gears! hooker headers, flow's 2 1/2" exhaust true dualls
[This message has been edited by monte-ss (edited July 24, 2000).]
Thanks.
As far as me using 20W-30, I still think I will use it because it is very hot here, 100-110 this time of year, and my car runs at 220 all the time and I am always having to stop for lights. My oil pressure also tends to go down to about 15-20 when stopped which I don't like at all. So it is more about temp and oil pressure than anything.
Don't worry, I plan on going to 10W-30 for the winter as I always do
Unless someone tells me it will hurt my engine using 20W-50 then that is what I will continue to use in the summers around here.
Glad to hear I can still switch though
As far as me using 20W-30, I still think I will use it because it is very hot here, 100-110 this time of year, and my car runs at 220 all the time and I am always having to stop for lights. My oil pressure also tends to go down to about 15-20 when stopped which I don't like at all. So it is more about temp and oil pressure than anything.
Don't worry, I plan on going to 10W-30 for the winter as I always do
Unless someone tells me it will hurt my engine using 20W-50 then that is what I will continue to use in the summers around here.
Glad to hear I can still switch though
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