finding right cruising speed for economical gas mileage
We just purchased a used 2008 Winnebago View with 5400 miles. Does anyone know a good speed to travel at to get the most out of the mileage? It is a V-6 diesel motor.
KD4UPL wrote:
Around here the minimum speed on interstates is 45 but the limit is 70. Are you saying everybody is happy if you poke along at 50 in a 70? I'm pretty sure they're not.
OP, slower is the answer to a point. You need to be at the engine's peak torque RPM while your transmission is in it's top gear. That should theoretically be your best MPG.
KD4UPL wrote:
Around here the minimum speed on interstates is 45 but the limit is 70. Are you saying everybody is happy if you poke along at 50 in a 70? I'm pretty sure they're not.
OP, slower is the answer to a point. You need to be at the engine's peak torque RPM while your transmission is in it's top gear. That should theoretically be your best MPG.
gbopp wrote:
Welcome to the forum. Slower is usually more economical.
In our Class A gas Southwind I usually travel about 58-62 mph. That gives me the best mileage and isn't unreasonably slow.
I don't know about a diesel but, I would think the same is true.
gbopp wrote:
Welcome to the forum. Slower is usually more economical.
In our Class A gas Southwind I usually travel about 58-62 mph. That gives me the best mileage and isn't unreasonably slow.
I don't know about a diesel but, I would think the same is true.
KD4UPL wrote:This is basically what I do. My transmission shifts into 4 gear at 45 mpg on a flat road, if I travel at 50 mpg it will not downshift on slight hills. Also by not using cruise control and accelerating slightly I can keep it in 4th gear without downshifting when approaching a hill. I also still use a vacuum gauge to drive(I'm old) and know when it will down shift based on vacuum readings so I take my foot off the pedal and reduce speed before it downshifts keeping it in 4th gear. If you have a 5 or 6 speed your speed will be higher.","body@stripHtml({\"removeProcessingText\":false,\"removeSpoilerMarkup\":false,\"removeTocMarkup\":false,\"truncateLength\":200})@stringLength":"203","kudosSumWeight":0,"repliesCount":0,"postTime":"2014-03-27T18:43:39.000-07:00","lastPublishTime":"2014-03-27T18:43:39.000-07:00","metrics":{"__typename":"MessageMetrics","views":161},"visibilityScope":"PUBLIC","placeholder":false,"originalMessageForPlaceholder":null,"isEscalated":null,"solution":false,"entityType":"FORUM_REPLY","eventPath":"grouphub:Motorhomes/category:TRAVELCENTER/community:feyqc97479board:Motorhomesforum-board/message:1116327/message:1116335","replies":{"__typename":"MessageConnection","pageInfo":{"__typename":"PageInfo","hasNextPage":false,"endCursor":null,"hasPreviousPage":false,"startCursor":null},"edges":[]},"customFields":[],"readOnly":false,"editFrozen":false,"body@stringLength":"932","rawBody":"
Around here the minimum speed on interstates is 45 but the limit is 70. Are you saying everybody is happy if you poke along at 50 in a 70? I'm pretty sure they're not.
OP, slower is the answer to a point. You need to be at the engine's peak torque RPM while your transmission is in it's top gear. That should theoretically be your best MPG.
KD4UPL wrote:This is basically what I do. My transmission shifts into 4 gear at 45 mpg on a flat road, if I travel at 50 mpg it will not downshift on slight hills. Also by not using cruise control and accelerating slightly I can keep it in 4th gear without downshifting when approaching a hill. I also still use a vacuum gauge to drive(I'm old) and know when it will down shift based on vacuum readings so I take my foot off the pedal and reduce speed before it downshifts keeping it in 4th gear. If you have a 5 or 6 speed your speed will be higher.","images":{"__typename":"AssociatedImageConnection","edges":[],"totalCount":0,"pageInfo":{"__typename":"PageInfo","hasNextPage":false,"endCursor":null,"hasPreviousPage":false,"startCursor":null}},"attachments":{"__typename":"AttachmentConnection","pageInfo":{"__typename":"PageInfo","hasNextPage":false,"endCursor":null,"hasPreviousPage":false,"startCursor":null},"edges":[]},"timeToRead":1,"currentRevision":{"__ref":"Revision:revision:1116335_1"},"latestVersion":null,"messagePolicies":{"__typename":"MessagePolicies","canModerateSpamMessage":{"__typename":"PolicyResult","failureReason":{"__typename":"FailureReason","message":"error.lithium.policies.feature.moderation_spam.action.moderate_entity.allowed.accessDenied","key":"error.lithium.policies.feature.moderation_spam.action.moderate_entity.allowed.accessDenied","args":[]}}}},"User:user:273971":{"__typename":"User","id":"user:273971","uid":273971,"login":"KD4UPL","biography":null,"registrationData":{"__typename":"RegistrationData","status":null,"registrationTime":"2008-03-16T18:18:04.000-07:00"},"deleted":false,"email":"","avatar":{"__typename":"UserAvatar","url":"https://community.goodsam.com/t5/s/feyqc97479/m_assets/avatars/default/avatar-7.svg?time=1737155183000"},"rank":{"__ref":"Rank:rank:42"},"entityType":"USER","eventPath":"community:feyqc97479/user:273971"},"ModerationData:moderation_data:1116334":{"__typename":"ModerationData","id":"moderation_data:1116334","status":"APPROVED","rejectReason":null,"isReportedAbuse":false,"rejectUser":null,"rejectTime":null,"rejectActorType":null},"ForumReplyMessage:message:1116334":{"__typename":"ForumReplyMessage","author":{"__ref":"User:user:273971"},"id":"message:1116334","revisionNum":1,"uid":1116334,"depth":1,"hasGivenKudo":false,"subscribed":false,"board":{"__ref":"Forum:board:Motorhomesforum-board"},"parent":{"__ref":"ForumTopicMessage:message:1116327"},"conversation":{"__ref":"Conversation:conversation:1116327"},"subject":"Re: finding right cruising speed for economical gas mileage","moderationData":{"__ref":"ModerationData:moderation_data:1116334"},"body":"Around here the minimum speed on interstates is 45 but the limit is 70. Are you saying everybody is happy if you poke along at 50 in a 70? I'm pretty sure they're not.
Around here the minimum speed on interstates is 45 but the limit is 70. Are you saying everybody is happy if you poke along at 50 in a 70? I'm pretty sure they're not.
OP, slower is the answer to a point. You need to be at the engine's peak torque RPM while your transmission is in it's top gear. That should theoretically be your best MPG.
