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| 4/14/2018 | Coos Bay Speedway - Coos Bay, OR NASCAR Season Opener Winged Sprints, Stock Cars, Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 2nd | - | - | 2nd |
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| 4/21/2018 | Coos Bay Speedway - Coos Bay, OR South Coast Shopper Carload Night "Lucky Rides For The Kids" Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Enduro, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 2nd | 2nd | - | 1st |
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| 5/5/2018 | Coos Bay Speedway - Coos Bay, OR Pepsi Night Winged Sprints, Stock Cars, Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 2nd | 1st | - | 2nd |
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| 5/19/2018 | Coos Bay Speedway - Coos Bay, OR Mega Bike Giveaway ISCS Sprint Tour 360 Sprints - Winged: ISCS-Interstate Sprint Car Series (360) Limited Sprints - Winged, Winged Sprints, Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 1st | 3rd | - | 2nd |
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| 5/26/2018 | Coos Bay Speedway - Coos Bay, OR Kid's Night Penny Gold Rush Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Enduro, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 2nd | 3rd | - | 1st |
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| 6/2/2018 | Coos Bay Speedway - Coos Bay, OR Beast Jett Car Burndown Stock Cars, Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 1st | 1st | - | 1st |
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| 6/23/2018 | Coos Bay Speedway - Coos Bay, OR Ladies Night (Prowler Charters Trophy Sponsor) Winged Sprints, Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 4th (DNF) | 4th | - | 1st |
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| 6/24/2018 | Coos Bay Speedway - Coos Bay, OR IMCA Modified Speedweek Sunday Gambler A Modifieds: Wild West Modified Tour Street Stocks, Hornets, Economy Late Models, Pony Stock, Mini Outlaws | Results | | Dyllan Siewell (Economy Late Models) | - | - | - | - |
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| 6/30/2018 | Coos Bay Speedway - Coos Bay, OR Lucky Rides For The Kids Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Enduro, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 4th | 3rd | - | 3rd |
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| 7/7/2018 | Coos Bay Speedway - Coos Bay, OR Eve of Destruction IX Mr. American Dare Devil Mr. Dizzy & Oregon Coast's Best FIREWORKS Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Enduro, Pony Stock, Mini Outlaws | Results | | Dyllan Siewell (Economy Late Models) | 2nd | 3rd | - | 2nd |
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| 7/10/2018 | Coos Bay Speedway - Coos Bay, OR Western Sprint Tour 360 Speedweek 360 Sprints - Winged: Western Sprint Tour Street Stocks, Hornets, Economy Late Models, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 2nd | 3rd | - | 1st |
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| 7/21/2018 | Coos Bay Speedway - Coos Bay, OR Super Late Model Tidal Wave Weekend Stock Cars, Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 2nd | 2nd | - | 1st |
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| 7/22/2018 | Coos Bay Speedway - Coos Bay, OR Super Late Model Tidal Wave 50 Sunday Afternoon 2pm Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 2nd | 3rd | - | 2nd |
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| 7/28/2018 | Coos Bay Speedway - Coos Bay, OR Whelen Night "Lucky Rides For The Kids" Winged Sprints, Stock Cars, Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Enduro, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 2nd | 1st | - | 2nd |
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| 8/4/2018 | Coos Bay Speedway - Coos Bay, OR K&N Engineering Fan Appreciation Night Outlaw Prostock Challenge Winged Sprints, Stock Cars, Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 2nd | - | - | DNS |
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| 8/13/2018 | Coos Bay Speedway - Coos Bay, OR Week Of Speed ISCS Winged Sprint Cars Limited Sprints - Winged, Dwarf, Hornets, Pro Dwarf | Results | | Dyllan Siewell (Hornets) | - | - | - | 1st |
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| 8/18/2018 | Coos Bay Speedway - Coos Bay, OR Ken Ware Chevrolet Night Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 4th (DNF) | 3rd | - | 2nd |
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| 8/25/2018 | Coos Bay Speedway - Coos Bay, OR Street Stock Battle At The Beach "Lucky Rides For The Kids" Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Enduro, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 2nd | 1st | - | 2nd |
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| 9/1/2018 | Coos Bay Speedway - Coos Bay, OR Wingless Sprint Series Ironman 360 Sprints - Non-Winged: (Duplicated) WSS-Wingless Sprint Series Winged Sprints, Sprint Cars, Stock Cars, Street Stocks, Hornets, Economy Late Models, Pony Stock | Results | | Dyllan Siewell (Hornets) | DNS | - | - | 3rd | | Dyllan Siewell (Economy Late Models) | 2nd | 3rd | - | 2nd |
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| 9/8/2018 | Coos Bay Speedway - Coos Bay, OR Sponsor Appreciation/NASCAR Championship Night Street Stocks, Dirt Late Models, Hornets, Economy Late Models, Enduro, Pony Stock | Results | | Dyllan Siewell (Economy Late Models) | 3rd | 1st | - | 3rd |
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| 9/29/2018 | Coos Bay Speedway - Coos Bay, OR ISCS Winged Sprint Car Championship Night 360 Sprints - Winged: ISCS-Interstate Sprint Car Series (360) Limited Sprints - Winged, Street Stocks, Hornets, Economy Late Models, Pony Stock, Mini Outlaws | Results | | Dyllan Siewell (Hornets) | 1st | 4th | - | 7th |
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