(at around 49 mins) When Cletus pulls up to a gas station in the '66 Mustang, he parks right in front of the entrance doors. When he exits the car, he has clearly parked the car further off to the side instead in the front of the doors.
The facility that Shriek is being kept at is called Ravencroft, however in the credits all characters are referred to as working at Ravenscroft.
(at around 53 mins) When Shriek is reversing the mustang she reaches into the center to pull the emergency brake, but in the 1966 Mustang the emergency brake is a handle on the left side of the driver.
(at around 43 mins) Symbiotes are sensitive to loud sounds and noises yet Venom wasn't affected by the music at the rave. Rave parties don't usually produce sounds on the hyper/super sonic range.
(at around 22 mins) Eddie consistently uses his helmet, but doesn't fasten the chin-strap. However, a later scene where he deliberately endangers his own life contains dialogue where he states that he knows he can't come to serious physical harm with Venom inside him.
(at around 22 mins) In the riding in the rain scene, to avoid hitting the car, Eddie turns left (by counter-steering to the right) but the bike turns right.
(at around 54 mins) As Shriek and Cletus drive away from Ravencroft in the mustang, light reflects on the windshield of the vehicle despite having been completely destroyed by Shriek seconds before.
The opening scene is set in 1996. The type of Crown Victoria police cruiser shown wasn't produced in that body style until 1998.
(at around 27 mins) The Sergeant in the prison is wearing his collar brass upside down.