C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

oil selection for '85

Thread Tools
 
Search this Thread
 
Old Jun 22, 2003 | 05:32 PM
  #1  
ROCKY85's Avatar
ROCKY85
Thread Starter
Instructor
 
Joined: Jun 2003
Posts: 128
Likes: 0
From: tampa fl
Default oil selection for '85

Looking for some advice recently acquired an '85 (last owned was a "74 before kids). Doing first oil change and wondered if there is better oil to use with 95,000 miles on the car and with all the advances since '85 should I run somethign different, also now residing in Florida are the high temps a consideration?
Thanks
Rocky85 :confused:
Reply
Old Jun 22, 2003 | 08:03 PM
  #2  
rsafier's Avatar
rsafier
Burning Brakes
15 Year Member
 
Joined: Feb 2003
Posts: 1,212
Likes: 0
From: OH
Default Re: oil selection for '85 (ROCKY85)

I switched to 10W30 Mobil 1 Full Synthetic. I think it runs better, definately cleans out the system, the first time you change it from switching over it is near black (at least mine was). After that even at 5000 miles it is pretty clean. One problem though, it is thinner then the normal stuff, and it tends to leak from valve cover seals easier. When I switched I leaked more then normal for my seals. Which when it is $4.99 retail for a quart can get expensive. I solved this problem by switching to a 160deg t-stat, which now completely ended my leaks, because the oil rarely gets to past 200 (only time I see 200+F is when I autocross near my last runs of the day).
Reply
Old Jun 22, 2003 | 09:35 PM
  #3  
Southern Comfort's Avatar
Southern Comfort
Le Mans Master
 
Joined: May 2003
Posts: 5,203
Likes: 0
From: Las Vegas Nevada
Default Re: oil selection for '85 (rsafier)

My 85 has 150k If I did switch to syn I think I would go with the 20-50. Cold not a problem here in Vegas :yesnod:
Reply
Old Jun 22, 2003 | 09:53 PM
  #4  
Blueyednd's Avatar
Blueyednd
Drifting
 
Joined: May 2002
Posts: 1,432
Likes: 0
From: Southeastern Louisiana
St. Jude Donor '05
Default Re: oil selection for '85 (ROCKY85)

I use Mobil 1 with everything. But in my previous 84 (90K miles) I switched to Mobil 1. I already had a little puff of smoke on startup, and when the Mobil 1 hit its system, the little puff got bigger and I started noticing some leaks around the valve covers (the stuff is just so slick). When I got my 85 (70K), it too had the small white puff on startup. I changed oil to the Valvoline Max Life Higher Mileage stuff, no more smoke. I will change the valve seals someday, but the valvoline stuff seemed to work for me...
Reply
Old Jun 22, 2003 | 09:55 PM
  #5  
vader86's Avatar
vader86
Team Owner
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2001
Posts: 62,153
Likes: 1,731
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Default Re: oil selection for '85 (ROCKY85)

Mobil 1 5w30 in my 86.
Reply

Get notified of new replies

To oil selection for '85





All times are GMT -4. The time now is 08:25 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE