Should I use 5W30 on an 87 Pontiac Grand Prix Brougham V6 engine?


Asked by Jun 05, 2014 at 03:27 PM about the 1987 Pontiac Grand Prix Brougham

Question type: General

Car has just over 120,000 miles on it. I was thinking of synthetic high mileage oil. Is it a waste of money with no real difference?

3 Answers


I switched to 10w30 full synthetic on every car I've owned since as far back as I first read a report about it. It (I swear) has lasted longer between oil changes still looking like new. Lot of guys I asked said why go to 5 as it's only 5 until the engine warms up a tad.( viscosity increases with engine temp)

1 out of 1 people think this is helpful.

I would go for it, the high mileage has some additives in it to help the seals so they don't harden quite as fast and it tends to last longer between changes.

2 out of 2 people think this is helpful.

Agree. Go to synthetic and then double your oil change intervals. Changing the filter once between oil changes might be a good idea, but changing the oil sooner is just wasting money.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 4,388 nationwide Grand Prix listings starting at $1,972.


Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Reputation 3,690
#2 Tom Demyan
Tom Demyan
Reputation 2,450
#3 munron
Reputation 1,960
View All

Related Models For Sale

Used Pontiac Bonneville"
860 listings starting at $1,450
Used Dodge Charger"
647 Great Deals out of 30,064 listings starting at $1,995
Used Pontiac Grand Am"
2,008 listings starting at $1,995
Used Chevrolet Monte Carlo"
14 Great Deals out of 2,069 listings starting at $2,000
Used Ford Mustang"
720 Great Deals out of 41,399 listings starting at $900
Used Chevrolet Camaro"
795 Great Deals out of 38,866 listings starting at $2,650
Used Nissan Maxima"
462 Great Deals out of 24,141 listings starting at $800

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
16 Great Deals out of 556 listings starting at $2,495
2007 Pontiac Grand Prix For Sale
597 listings starting at $5,500
2006 Pontiac Grand Prix For Sale
6 Great Deals out of 791 listings starting at $2,950
2005 Pontiac Grand Prix For Sale
5 Great Deals out of 505 listings starting at $1,972