Oil Question

csc67 · 01-07-05, 12:46 PM

I own an 1989 vette that has always been serviced with 'regular' oil - Can I use synthetic from April - Dec and then go back to 'regular' oil for storage

Thanks

Chris

MyOtherCar · 01-07-05, 02:49 PM

I think not, but why would you want to? Cost of oil is minimal, really. 5W-30 sells for $1.50/qt and Mobil 1 for $4.50/qt. 6 qts difference only totals $18.00. Once or twice a year oil change..... not that expensive.

94C4 · 01-07-05, 02:58 PM

Some people think that switching between synthetic oil and regular oil will cause leaks. I don't know if it's true, but I have heard that. If that is the case, you would probably be better off sticking with the regular motor oil.

1stC3Vette · 01-07-05, 03:17 PM

Quote:

Originally Posted by MyOtherCar

I think not, but why would you want to? Cost of oil is minimal, really. 5W-30 sells for $1.50/qt and Mobil 1 for $4.50/qt. 6 qts difference only totals $18.00. Once or twice a year oil change..... not that expensive.

I agree. Go with the synthetic and stay there. Your engine will thank you for it.

Vettefan87 · 01-08-05, 12:08 AM

If you go with synthetic, and stay with synthetic you will be fine, as long as you don't have any leaks right now. I am not sure about switching back, and forth, but I wouldn't do it in my car.

ProEMTPFF · 01-08-05, 12:16 AM

Quote:

Originally Posted by Vettefan87

If you go with synthetic, and stay with synthetic you will be fine, as long as you don't have any leaks right now. I am not sure about switching back, and forth, but I wouldn't do it in my car.

^^^^I agree^^^^

vetteboy86 · 01-08-05, 12:19 AM

What happens is that the synthetic has a tendancy to clean better then the convential from what I understand. If you have any depsits in your engine the synthetic can break those down and cause a leak.

Ken · 01-08-05, 01:05 AM

Other than the aforementioned possibility ("likelihood" in all probability) of leaks, there should be no reason you cannot mix conventional motor oil with synthetic oil; Ford's Motorcraft oil advertises it as being a blend of synthetic and hydrocracked base oils.

But then again

Quote:

... I wouldn't do it in my car.

01-08-05, 02:30 AM

I have switched back and forth between regular Mobil oil and Mobil 1 in my old 87 Buick with 320,000 miles. Used Mobil 1 in the winter for better starting. This engine never did use more than a cup full in between 5000 mile oil changes. I gave this car away when the doors started rusting and bought another salt free 87 Buick with 100,000 miles. I am switching back and forth with this one also. Oil consumption is also nil. I don't think it matters.