---
product_id: 71942214
title: "Spectro R.HDPCO Heavy Duty Primary Chaincase Oil, 1 Quart"
brand: "spectro oil"
price: "VT15118"
currency: VUV
in_stock: true
reviews_count: 8
category: "Spectro Oil"
url: https://www.desertcart.vu/products/71942214-spectro-r-hdpco-heavy-duty-primary-chaincase-oil-1-quart
store_origin: VU
region: Vanuatu
---

# Special polymers for clutch & temp stability SAE 85 viscosity for low drag Specifically tuned for Harley Sportster & Big Twin Spectro R.HDPCO Heavy Duty Primary Chaincase Oil, 1 Quart

**Brand:** spectro oil
**Price:** VT15118
**Availability:** ✅ In Stock

## Summary

> 🏍️ Shift Smooth, Ride Confident: The Ultimate Harley Chaincase Oil

## Quick Answers

- **What is this?** Spectro R.HDPCO Heavy Duty Primary Chaincase Oil, 1 Quart by spectro oil
- **How much does it cost?** VT15118 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/71942214-spectro-r-hdpco-heavy-duty-primary-chaincase-oil-1-quart)

## Best For

- spectro oil enthusiasts

## Why This Product

- Trusted spectro oil brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Engineered for Harley:** Tailored formula meets and exceeds all Harley-Davidson OEM warranty specs
- • **Thermal Stability Mastery:** Special polymers maintain performance under extreme heat and load
- • **Precision Clutch Performance:** Eliminates clutch drag and slipping for seamless gear shifts
- • **Premium Sheer Stable Petroleum:** Optimized viscosity reduces friction loss, boosting efficiency and longevity
- • **Universal Fit, Ultimate Reliability:** Fits a wide range of heavy-duty primary chaincases with confidence

## Overview

Spectro R.HDPCO Heavy Duty Primary Chaincase Oil is a premium SAE 85 viscosity oil formulated with advanced polymers to ensure superior clutch engagement and temperature stability. Designed specifically for Harley Sportster and Big Twin motorcycles, it eliminates clutch drag and slipping while exceeding all OEM and Harley-Davidson warranty requirements. This universal fit, sheer stable petroleum product guarantees reliable, smooth shifting and long-lasting protection under high load conditions.

## Description

This sheer stable petroleum is designed to withstand the punishment of high loads, and contains special polymers to provide exceptional clutch engagement and temperature stability. Formulated specifically for Harley Sportster and Big Twin applications. Low drag, low friction loss SAE 85 viscosity eliminates clutch "drag" and slipping. Exceeds all known OEM and Harley-Davidson warranty requirements.

Review: Great primary oil - Love this primary oil. Shifts smoother. I also use their 6 speed transmission oil when I do my 3 hole oil change. Worth the $$
Review: Reliable & Premium Primary Chain case Oil - I could not find this product with any local vendors but I managed to find it online and it arrived in a rather short period of time. I used this oil on the main primary of my BigDog Ridgeback Chopper and this was after doing quite a bit of research and bottom line is you want to use a good product that will not cause you headaches down the line. I highly recommend this product because it is reliable.

## Features

- Sheer stable petroleum
- Special polymers for superior clutch engagement and temp stability
- Specific for Harley Sportster and Big Twin applications
- Eliminates clutch drag and slipping SAE 85
- Exceeds all known OEM and Harley Warranty requirements
- Fit Type: Universal Fit

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0765J3G88 |
| Best Sellers Rank | #67,736 in Automotive ( See Top 100 in Automotive ) #25 in Powersports Chain Oil #3,059 in Powersports Parts |
| Brand | Spectro Oil |
| Customer Reviews | 4.7 4.7 out of 5 stars (342) |
| Date First Available | October 4, 2017 |
| Global Trade Identification Number | 00831556000127 |
| Is Discontinued By Manufacturer | No |
| Item Form | Oil |
| Item Weight | 1.98 pounds |
| Item model number | R.HDPCO |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Spectro |
| Manufacturer Part Number | R.HDPCO |
| Model | R.HDPCO |
| Number of Items | 1 |
| Package Information | Can |
| Product Dimensions | 4 x 2.5 x 8.95 inches |
| SAE J300 Viscosity Grade | 8 |
| UPC | 831556000127 |
| Unit Count | 32.0 Fluid Ounces |
| Viscosity | SAE 85 |

## Product Details

- **Brand:** Spectro Oil
- **Item Form:** Oil
- **Liquid Volume:** 32 Fluid Ounces
- **Package Information:** Can
- **Viscosity:** SAE 85

## Images

![Spectro R.HDPCO Heavy Duty Primary Chaincase Oil, 1 Quart - Image 1](https://m.media-amazon.com/images/I/81DOUeP1LXL.jpg)

## Questions & Answers

**Q: Is this synthetic oil?**
A: Yes, Primary oil

**Q: What weight is this oil**
A: 85w

**Q: Will this work in my 2018 cvo roadglid**
A: yes it will!.. using it in my 2019 CVO Street Glide

**Q: How many ounces is this?**
A: 32 ounces

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great primary oil
*by J***A on December 4, 2025*

Love this primary oil. Shifts smoother. I also use their 6 speed transmission oil when I do my 3 hole oil change. Worth the $$

### ⭐⭐⭐⭐⭐ Reliable & Premium Primary Chain case Oil
*by V***S on September 14, 2020*

I could not find this product with any local vendors but I managed to find it online and it arrived in a rather short period of time. I used this oil on the main primary of my BigDog Ridgeback Chopper and this was after doing quite a bit of research and bottom line is you want to use a good product that will not cause you headaches down the line. I highly recommend this product because it is reliable.

### ⭐⭐⭐⭐⭐ Best Harley Primary Case Oil
*by E***8 on January 1, 2026*

Absolutely the best primary case ok for your Harley!!!!!

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**Shop now:** [https://www.desertcart.vu/products/71942214-spectro-r-hdpco-heavy-duty-primary-chaincase-oil-1-quart](https://www.desertcart.vu/products/71942214-spectro-r-hdpco-heavy-duty-primary-chaincase-oil-1-quart)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-03-14*