| Premium gas in six cylinder?
- Click HERE for Original Thread
|
| fishsteelhead |
| Have 1965 Cevrolet pick-up with 292 six and would like ta' know if runnin' premium gas in it will cause any damage to engine, I'm already aware that it will to my pocket-book?! I always thought that by runnin' a higher octane was'nt a problem, but was told not for an extended period of time!? Any response is appreciated. Outta here... ~ Skip |
|
|
| G. COLTON |
quote:
Originally posted by fishsteelhead
Have 1965 Cevrolet pick-up with 292 six and would like ta' know if runnin' premium gas in it will cause any damage to engine, I'm already aware that it will to my pocket-book?! I always thought that by runnin' a higher octane was'nt a problem, but was told not for an extended period of time!? Any response is appreciated. Outta here... ~ Skip
It will cause not damage, but why would you want to burn gasoline that costs more. The primary difference between regular and premium are the anti-knock properties. It will not give you more performance nor will it give you better gas mileage.
G |
|
|
| fishsteelhead |
G,
Truck just seems ta' run smoother, whether it be psychological or not, will just have ta' tolerate the D _ _ n gas $$$. Truck is solely used for ranch work and an occasional run to town. Have a good one. Outta here... ~ Skip |
|
|
| mdxforever |
Do you hear knocking under normal driving conditions or under load (uphill, accelerating, towing, etc..) ?
What is the compression ratio of that engine ?
Are you using hotter or colder spark plugs than the normal recommended ones ? |
|
|
| nightguy |
If the premium you're using does not contain ethanol and 87 does, then I wouldn't hesitate to spend the extra $. Ethanol doesn't do today's engines any favors and assuming that engine is 40 years old, ethanol is bad for it.
Is that an original engine ? Do you have to use a lead additive ?
Edit:
Yep, that's me asking that. I think you need the lead additive. The engine probably requires lead. After engines changed over, gasoline used to come as regular and unleaded. Once again, I think you need leaded. Leaded gasoline is the key here. They don't sell it in this country, so you need to put the additive in.:) |
|
|
| mdxforever |
quote:
Originally posted by mdxforever
Are you using hotter or colder spark plugs than the normal recommended ones ?
another way of asking this question is -
Which of these best describes the condition of your plugs - http://www.densoiridium.com/howtoreadusedplugs.php ? |
|
|
| 04mdx4sq |
quote:
Originally posted by mdxforever
Do you hear knocking under normal driving conditions or under load (uphill, accelerating, towing, etc..) ?
What is the compression ratio of that engine ?
Are you using hotter or colder spark plugs than the normal recommended ones ?
If the engine is stock and timing is correct on that engine, you shouldn't have any spark knock (predetonation) issues as they were low compression truck motors, somewhere around 7.3 to 1. I think the bigger issue with the unleaded fuel would be the effects on the factory valve seats. |
|
|
| G. COLTON |
04MDX has brought up a very important point. The most important additive for your vintage truck is lead. Those engines were designed to use leaded gasoline. If you are not already putting a lead additive in your fuel you should start immediately.
G |
|
|
| fishsteelhead |
| I thank ya' all for the responses (did'nt think I get so many come-backs ). When speakin' of additives is there a certain brand one should one look into? Again thanks and have a good one. Outta here... ~Skip |
|
|
| 04mdx4sq |
quote:
Originally posted by fishsteelhead
I When speakin' of additives is there a certain brand one should one look into?
STP and Redline are two that are come to mind, there are probably several brands out there. Depending on how long the engine has been run on unleaded fuel, it may be worthwhile to have the head redone with hardened valve seats. This will allow the use of unleaded without lead substitutes. |
|
|
|
|
|
