
The following table compares the fuel economies of different models of Oldsmobile Ninety-Eight cars, across model years.
The annual fuel costs (shown in the right-hand columns) are calculated based on an estimated annual mileage of 15,000 miles,
of which 55% of the miles are city driving, and 45% of the miles are highway driving.
Annual Cost 1 assumes a fuel cost of $5.00 per gallon, while Annual Cost 2 assumes a fuel cost of $6.00 per gallon.
| Model Year | Transmission | Cyl. | Combined MPG | City MPG |
Highway MPG |
Annual Cost 1 |
Annual Cost 2 |
|---|---|---|---|---|---|---|---|
| 1987 Ninety-Eight Regency | Automatic 4-speed | 6 | 19 | 16 | 25 | $3,928 | $4,713 |
| 1986 Ninety-Eight Regency | Automatic 4-speed | 6 | 20 | 17 | 27 | $3,676 | $4,411 |
| 1985 Ninety-Eight Regency | Automatic 4-speed | 6 | 18 | 15 | 23 | $4,217 | $5,060 |
| 1985 Ninety-Eight Regency | Automatic 4-speed | 6 | 23 | 19 | 29 | $3,334 | $4,001 |
| 1985 Ninety-Eight Regency | Automatic 4-speed | 6 | 19 | 16 | 23 | $4,045 | $4,854 |
| 1985 Ninety-Eight Regency | Automatic 4-speed | 6 | 19 | 17 | 24 | $3,832 | $4,599 |
| 1985 Ninety-Eight Regency | Automatic 4-speed | 6 | 23 | 19 | 29 | $3,334 | $4,001 |
| Model Year | Transmission | Cyl. | Combined MPG | City MPG |
Highway MPG |
Annual Cost 1 |
Annual Cost 2 |
|---|---|---|---|---|---|---|---|
| 1984 Ninety-Eight II | Automatic 4-speed | 6 | 24 | 21 | 31 | $3,052 | $3,663 |
| Model Year | Transmission | Cyl. | Combined MPG | City MPG |
Highway MPG |
Annual Cost 1 |
Annual Cost 2 |
|---|---|---|---|---|---|---|---|
| 1996 Ninety-Eight | Automatic 4-speed | 6 | 21 | 17 | 27 | $3,676 | $4,411 |
| 1995 Ninety-Eight | Automatic 4-speed | 6 | 20 | 17 | 26 | $3,724 | $4,469 |
| 1994 Ninety-Eight | Automatic 4-speed | 6 | 18 | 15 | 24 | $4,156 | $4,987 |
| 1994 Ninety-Eight | Automatic 4-speed | 6 | 20 | 17 | 25 | $3,776 | $4,531 |
| 1993 Ninety-Eight | Automatic 4-speed | 6 | 20 | 17 | 25 | $3,776 | $4,531 |
| 1993 Ninety-Eight | Automatic 4-speed | 6 | 18 | 15 | 25 | $4,100 | $4,920 |
| 1992 Ninety-Eight | Automatic 4-speed | 6 | 18 | 15 | 24 | $4,156 | $4,987 |
| 1992 Ninety-Eight | Automatic 4-speed | 6 | 19 | 16 | 24 | $3,984 | $4,781 |
| 1984 Ninety-Eight | Automatic 4-speed | 8 | 16 | 14 | 21 | $4,553 | $5,464 |
| 1984 Ninety-Eight | Automatic 4-speed | 8 | 21 | 18 | 26 | $3,589 | $4,307 |
| 1984 Ninety-Eight | Automatic 4-speed | 8 | 16 | 14 | 20 | $4,633 | $5,560 |
Data source: Fuel Economy USA, Reference.