![](\"https:\/\/cdn.images.express.co.uk\/img\/dynamic\/24\/590x\/secondary\/The-car-mechanic-5030134.jpg?r=1698165181157\")
<\/p>\n<\/p>\n
A car mechanic has warned fellow drivers about which button to avoid while driving if they want to avoid sleepiness while on the road.<\/p>\n
Car mechanic Scotty Kilmer runs one of the most-watched car channels in America, where he divulges information about vehicles and their features.\u00a0<\/p>\n
The technician has acquired a score of handy tips over his career of 55 years, including knowledge about which buttons to avoid in different circumstances.<\/p>\n
In one of his recent clips, Kilmer set out to raise awareness of the different air conditioning features and how they can affect carbon dioxide levels in the vehicle.<\/p>\n
\u201cToday I\u2019m going to show you why should run your air conditioning on fresh air, not recirculation,” he said.\u00a0<\/strong>\u201cNow [recirculation] is fine when it\u2019s really hot outside and you want to cool the car down faster.\u201d\u00a0<\/strong><\/p>\n Don’t miss… <\/strong> This can present a slight hazard during longer trips, according to Kilmer, as the carbon dioxide levels will start building up when oxygen levels.<\/p>\n \u201cYou\u2019ll get sleepy from not having enough oxygen, so leave it on fresh when you\u2019re going down a highway for long trips,” he explained.\u00a0<\/p>\n In instances where outdoor temperatures are stifling recirculation is fine as long as the rear windows are kept slightly open, added the technician.\u00a0<\/p>\n \u201cLeave it on recirculation but crack one of the rear windows,\u201d he noted. \u201cThat\u2019s plenty enough air coming in to keep you wide awake while driving.\u201d\u00a0<\/strong><\/p>\n This information could prove invaluable to drivers traveling long distances, as studies have shown that higher-than-average levels of carbon dioxide in the car can hinder the driver\u2019s cognitive abilities and reduce response times over time.<\/p>\n The health tip was shared in a clip titled \u201cNever press this button while driving,\u201d which racked up more than 33,000 likes.<\/p>\n One viewer wrote in the comments: \u201cHow weird I\u2019ve totally experienced this but wasn\u2019t sure if it was in my head\u2026 I\u2019d get sleepy then [crank a] window and change the recirculating button and within a minute I\u2019m feeling much more alert!!! This confirms my suspicions.”<\/p>\n Another viewer quipped: \u201cAs a trucker, I\u2019m taking this into consideration.\u201d<\/p>\n<\/p>\n
‘I\u2019m a mechanic and there is one place I totally avoid when buying cars'[INFORMER ] <\/strong>
‘I’m a car mechanic – one tyre method can double your fuel economy'[INSIGHT] <\/strong>
\u2018I\u2019m a mechanic – UK electric car drivers face this problem that won\u2019t be fixed'[INFORMER ] <\/strong><\/p>\n![](\"https:\/\/cdn.images.express.co.uk\/img\/dynamic\/24\/590x\/secondary\/Carbon-Dioxide-5030141.jpg?r=1698165181208\")
<\/p>\n\n